tx: sync with transifex

128 files changed, 3718 insertions, 3717 deletions

diff --git a/po/af.po b/po/af.po
index 186becd..7224bca 100644
--- a/po/af.po
+++ b/po/af.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Afrikaans (https://www.transifex.com/mate/teams/13566/af/)\n"
@@ -475,7 +475,7 @@ msgid "64-bit"
 msgstr "64-bis"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Voorkeure"
 
@@ -526,7 +526,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Sakrekenaar"
 
@@ -1183,12 +1183,12 @@ msgstr "Teken"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1262,7 +1262,7 @@ msgid "Displayed value not an integer"
 msgstr "Vertoonde waarde nie 'n heelgetal nie"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1270,45 +1270,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grade"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiale"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiane"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Outomaties"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Vas"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Wetenskaplik"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingenieurs"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Wys %d desimale _plekke"
@@ -1353,70 +1353,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Sakrekenaar met finansiële en wetenskaplike modusse."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Sakrekenaar"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modus"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hulp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basies"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Gevorderd"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansieel"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmering"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Inhoud"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopieer"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Plak"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Ontdoen"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Herdoen"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Voorkeure"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Verlaat"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Aangaande"
 
diff --git a/po/am.po b/po/am.po
index 1974d50..db0d40e 100644
--- a/po/am.po
+++ b/po/am.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: samson <[email protected]>, 2018\n"
 "Language-Team: Amharic (https://www.transifex.com/mate/teams/13566/am/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr "64-ቢት "
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ምርጫዎች"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr "የ ሜት መደመሪያ "
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "መደመሪያ "
 
@@ -1144,12 +1144,12 @@ msgstr "ምልክት"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1231,45 +1231,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ራሱ በራሱ "
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "የተወሰነ "
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1311,70 +1311,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_ማስሊያ"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_ዘዴ "
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_እርዳታ"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_መሰረታዊ"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_የረቀቀ "
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_ገንዘብ"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_ይዞታዎች"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_ኮፒ "
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_መለጠፊያ "
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_መተው"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_እንደገና መስሪያ"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_ምርጫዎች "
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_ማጥፊያ"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_ስለ"
 
diff --git a/po/ar.po b/po/ar.po
index 1a2d70a..3090c57 100644
--- a/po/ar.po
+++ b/po/ar.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: مهدي السطيفي <[email protected]>, 2018\n"
 "Language-Team: Arabic (https://www.transifex.com/mate/teams/13566/ar/)\n"
@@ -476,7 +476,7 @@ msgid "64-bit"
 msgstr "64 بت"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "تفضيلات"
 
@@ -527,7 +527,7 @@ msgid "MATE Calculator"
 msgstr "حاسبة متّة"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "الحاسِبة"
 
@@ -1192,12 +1192,12 @@ msgstr "الإشارة"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "إلى"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "بدّل بين وحدات التحويل"
 
@@ -1271,7 +1271,7 @@ msgid "Displayed value not an integer"
 msgstr "اعرض قيمةً بدلًا من العدد الصحيح"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1279,45 +1279,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "درجات"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "قُطريات (راديان)"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ميولات (غراد)"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "تلقائي"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ثابت"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "علمي"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "هندسة"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "أظهر %d خا_نة عُشرية"
@@ -1371,70 +1371,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ألة حاسبة ذات خصائص علميّة و اقتصادية."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_حاسبة"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "الو_ضع"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_مساعدة"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_أساسي"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "مُ_تقدم"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_مصرفي"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "برم_جي"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "الم_حتويات"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "ا_نسخ"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ا_لصق"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_تراجع"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "أ_عِد"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "ال_تّفضيلات"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_خروج"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_عنْ"
 
diff --git a/po/as.po b/po/as.po
index 4c57aa5..7b57595 100644
--- a/po/as.po
+++ b/po/as.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Assamese (https://www.transifex.com/mate/teams/13566/as/)\n"
@@ -474,7 +474,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "পছন্দসমূহ"
 
@@ -525,7 +525,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "গণক"
 
@@ -1182,12 +1182,12 @@ msgstr "চিহ্ন"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " ভিতৰত "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "পৰিবৰ্তন এককসমূহ অদল বদল কৰক"
 
@@ -1261,7 +1261,7 @@ msgid "Displayed value not an integer"
 msgstr "প্ৰদৰ্শিত মান এটা পূৰ্ণসংখ্যা নহয়"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1269,45 +1269,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ডিগ্ৰিসমূহ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ৰেডিয়ানসমূহ"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "গ্ৰেডিয়ানসমূহ"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "স্বচালিত"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ঠিক কৰা হল"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "বৈজ্ঞানিক"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "অভিযান্ত্ৰিকী"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d দশমিক স্থানসমূহ দেখুৱাওক (_p)"
@@ -1349,70 +1349,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "অৰ্থনৈতিক এবং বৈজ্ঞানিক অৱস্থাসহ গণক।"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ক্যালকুলেটৰ"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "সাহায্য (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "মৌলিক (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Advanced"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "অৰ্থনৈতিক মোড (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "প্রোগ্রামিং (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "বিষয়বস্তু (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "নকল কৰক (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "আঠা লগাওক (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "পূৰ্বাবস্থা (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "পুনঃ কৰক (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "পছন্দ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "প্ৰস্থান (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "বিষয়ে (_A)"
 
diff --git a/po/ast.po b/po/ast.po
index bdae392..f38c9e4 100644
--- a/po/ast.po
+++ b/po/ast.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Asturian (https://www.transifex.com/mate/teams/13566/ast/)\n"
@@ -482,7 +482,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencies"
 
@@ -533,7 +533,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1190,12 +1190,12 @@ msgstr "Robla"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Cambear unidaes de conversión"
 
@@ -1269,7 +1269,7 @@ msgid "Displayed value not an integer"
 msgstr "El valor amosáu nun ye un enteru"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1277,45 +1277,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graos"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianes"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianes"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automáticu"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixu"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científicu"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inxeniería"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Amosar %d deci_males"
@@ -1370,70 +1370,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora con modos financieros y científicos."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mou"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ayuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Básica"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avanzada"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financiera"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programador"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Índiz"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "A_pegar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Desfacer"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refacer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencies"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Colar"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Tocante a"
 
diff --git a/po/az.po b/po/az.po
index 7409dbe..df93e64 100644
--- a/po/az.po
+++ b/po/az.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Azerbaijani (https://www.transifex.com/mate/teams/13566/az/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Qurğular"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Hesaplayıcı"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Maliyyə və elmi modları olan hesablayıcı."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Yardım"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Məzmun"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "Köçü_r"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Yapışdır"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Geri Al"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Təkrarla"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Seçimlər"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Çı_x"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Haqqında"
 
diff --git a/po/be.po b/po/be.po
index b3ca8bd..ea0a40b 100644
--- a/po/be.po
+++ b/po/be.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Mihail Varantsou <[email protected]>, 2018\n"
 "Language-Team: Belarusian (https://www.transifex.com/mate/teams/13566/be/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr "64 біты"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Настáўленні"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr "Калькулятар MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калькулятар"
 
@@ -1164,12 +1164,12 @@ msgstr "Сігнум"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " у "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Пераключыць кірунак канверсіі"
 
@@ -1243,7 +1243,7 @@ msgid "Displayed value not an integer"
 msgstr "Значэнне на экране не цэлае"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1251,45 +1251,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Градусы"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радыяны"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Грады"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Аўтаматычны"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Фіксаваны"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Навуковы"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Інжынерны"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Паказваць %d разрадаў пасля _коскі"
@@ -1333,70 +1333,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Калькулятар з падтрымкай фінансавых і навуковых функцый."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калькулятар"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Рэжым"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Даведка"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Просты"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Адмысловы"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Фінансавы"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Для праграмавання"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Змесціва"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Капіяваць"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Уставіць"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Адрабіць"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Вярнуць"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Настáўленні"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Выйсці"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Пра аплет"
 
diff --git a/po/bg.po b/po/bg.po
index 9ccdf00..70d6ee6 100644
--- a/po/bg.po
+++ b/po/bg.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Замфир Йончев <[email protected]>, 2018\n"
 "Language-Team: Bulgarian (https://www.transifex.com/mate/teams/13566/bg/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64 бита"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Настройки"
 
@@ -540,7 +540,7 @@ msgid "MATE Calculator"
 msgstr "MATE Калкулатор"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калкулатор"
 
@@ -1199,12 +1199,12 @@ msgstr "Знак"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "  в  "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Размяна на единиците за преобразуване"
 
@@ -1278,7 +1278,7 @@ msgid "Displayed value not an integer"
 msgstr "Показваната стойност не е цяло число"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1286,45 +1286,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "градуси"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "радиани"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "градиани"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "автоматично разпознаване"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "фиксирана запетая"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "научен"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "инженерен"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d _знака след запетаята"
@@ -1386,70 +1386,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Калкулатор с финансов и научен режим"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калкулатор"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Помощ"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Основен режим"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Разширен режим"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Финансов режим"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "Ре_жим за програмиране"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Ръководство"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Копиране"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Поставяне"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Връщане"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Повтаряне"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Настройки"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Изход"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Относно…"
 
diff --git a/po/bn.po b/po/bn.po
index 7aec47b..870b4d5 100644
--- a/po/bn.po
+++ b/po/bn.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Bengali (https://www.transifex.com/mate/teams/13566/bn/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "৬৪-বিট  "
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "পছন্দতালিকা"
 
@@ -529,7 +529,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ক্যালকুলেটর"
 
@@ -1184,12 +1184,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1263,7 +1263,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1271,45 +1271,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ডিগ্রি  "
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "রেডিয়ান  "
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "গ্রেডিয়ান  "
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "স্বয়ংক্রিয়"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "বৈজ্ঞানিক"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "প্রকৌশল"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1356,70 +1356,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "অর্থনৈতিক এবং বৈজ্ঞানিক মোডসহ ক্যালকুলেটর।"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ক্যালকুলেটর (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "সহায়িকা (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "মূল (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "উচ্চপর্যায়ের (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "অর্থনৈতিক (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "প্রোগ্রামিং (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "বিষয়বস্তু (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "অনুলিপি করুন (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "প্রতিলেপন (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "পূর্বাবস্থা (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "পুনরায় করুন (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "পছন্দ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "প্রস্থান (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "পরিচিতি (_A)"
 
diff --git a/po/bn_IN.po b/po/bn_IN.po
index 9c96da9..a165dbd 100644
--- a/po/bn_IN.po
+++ b/po/bn_IN.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Bengali (India) (https://www.transifex.com/mate/teams/13566/bn_IN/)\n"
@@ -479,7 +479,7 @@ msgid "64-bit"
 msgstr "৬৪-বিট"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "प्राथमिकताएं"
 
@@ -530,7 +530,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ক্যালকুলেটর"
 
@@ -1187,12 +1187,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1266,7 +1266,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "০,১,২,৩,৪,৫,৬,৭,৮,৯,A,B,C,D,E,F"
 
@@ -1274,45 +1274,45 @@ msgstr "০,১,২,৩,৪,৫,৬,৭,৮,৯,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ডিগ্রি"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "রেডিয়েন"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "গ্রেডিয়েন"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "স্বয়ংক্রিয়"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "বৈজ্ঞানিক মোড"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1357,70 +1357,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "অর্থনৈতিক এবং বৈজ্ঞানিক মোডসহ ক্যালকুলেটর।"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ক্যালকুলেটর (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "সাহায্য (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "মৌলিক মোড(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "উন্নত বৈশিষ্ট্য (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "অর্থনৈতিক মোড (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "প্রোগ্রামিং (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "সূচিপত্র (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "কপি করুন(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "পেস্ট করুন (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "পূর্বাবস্থা (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "পুনরাবৃত্তি (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_प्राथमिकताएं"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "প্রস্থান (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "পরিচিতি (_A)"
 
diff --git a/po/br.po b/po/br.po
index 0d7ec5f..cada070 100644
--- a/po/br.po
+++ b/po/br.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Alan Monfort <[email protected]>, 2018\n"
 "Language-Team: Breton (https://www.transifex.com/mate/teams/13566/br/)\n"
@@ -453,7 +453,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Gwellvezioù"
 
@@ -504,7 +504,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1151,12 +1151,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1230,7 +1230,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1238,45 +1238,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1318,70 +1318,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Skoazell"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Endal_c'hadoù"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Eilañ"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Pegañ"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Dizober"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Adober"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Gwellvezioù"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Kuitaat"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Diwar-benn"
 
diff --git a/po/bs.po b/po/bs.po
index 50ee411..d15afee 100644
--- a/po/bs.po
+++ b/po/bs.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Sky Lion <[email protected]>, 2018\n"
 "Language-Team: Bosnian (https://www.transifex.com/mate/teams/13566/bs/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Postavke"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Računalo"
 
@@ -1146,12 +1146,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1225,7 +1225,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1233,45 +1233,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1313,70 +1313,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Računalo sa financijskim i naučnim modima."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Pomoć"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sadržaj"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiraj"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Umetni"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Vrati"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Po_novi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Postavke"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Izađi"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_O"
 
diff --git a/po/ca.po b/po/ca.po
index be94067..c11b479 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Robert Antoni Buj Gelonch <[email protected]>, 2018\n"
 "Language-Team: Catalan (https://www.transifex.com/mate/teams/13566/ca/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64 bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferències"
 
@@ -540,7 +540,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora de MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1197,12 +1197,12 @@ msgstr "Signe"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " a "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Commuta les unitats de conversió"
 
@@ -1276,7 +1276,7 @@ msgid "Displayed value not an integer"
 msgstr "El valor a mostrar no és un enter"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1284,45 +1284,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graus"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Graus centesimals"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automàtic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fix"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científic"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Enginyer"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostra %d _posicions decimals"
@@ -1378,70 +1378,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora amb mode financer i científic."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ajuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Bàsic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avançat"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financer"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programació"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contingut"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copia"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Enganxa"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Desfés"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refés"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferències"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Surt"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Quant a"
 
diff --git a/po/[email protected] b/po/[email protected]
index f0bc8c7..f423529 100644
--- a/po/[email protected]
+++ b/po/[email protected]
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Pilar Embid <[email protected]>, 2018\n"
 "Language-Team: Catalan (Valencian) (https://www.transifex.com/mate/teams/13566/ca%40valencia/)\n"
@@ -482,7 +482,7 @@ msgid "64-bit"
 msgstr "64 bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferències"
 
@@ -539,7 +539,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora del MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1196,12 +1196,12 @@ msgstr "Signe"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " a "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Commuta les unitats de conversió"
 
@@ -1275,7 +1275,7 @@ msgid "Displayed value not an integer"
 msgstr "El valor mostrat no és un enter"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1283,45 +1283,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graus"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Graus centesimals"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automàtic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fix"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científic"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Enginyer"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostra %d _posicions decimals"
@@ -1379,70 +1379,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora amb mode financer i científic."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ajuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Bàsic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avançat"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financer"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programació"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Continguts"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copia"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Enganxa"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Desfés"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refés"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferències"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ix"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Quant a"
 
diff --git a/po/cmn.po b/po/cmn.po
index bd4a987..8a55d9a 100644
--- a/po/cmn.po
+++ b/po/cmn.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: 趙惟倫 <[email protected]>, 2018\n"
 "Language-Team: Chinese (Mandarin) (https://www.transifex.com/mate/teams/13566/cmn/)\n"
@@ -453,7 +453,7 @@ msgid "64-bit"
 msgstr "64 位元"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "偏好設定"
 
@@ -504,7 +504,7 @@ msgid "MATE Calculator"
 msgstr "MATE 計算機"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "計算機"
 
@@ -1158,12 +1158,12 @@ msgstr "符號函數"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "轉為"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "切換轉換單位"
 
@@ -1237,7 +1237,7 @@ msgid "Displayed value not an integer"
 msgstr "顯示的數值不是整數值"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0，1，2，3，4，5，6，7，8，9，A，B，C，D，E，F"
 
@@ -1245,45 +1245,45 @@ msgstr "0，1，2，3，4，5，6，7，8，9，A，B，C，D，E，F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "度"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "弧度"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "梯度"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "自動"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "固定的"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "科學計算"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "工程"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "顯示小數點後 %d 位數(_P)"
@@ -1340,70 +1340,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "附有財務及科學計算模式的計算機。"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "計算機(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "模式(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "求助(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "基本模式(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "進階模式(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "財務計算模式(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "軟體開發(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "內容(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "拷貝(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "貼上(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "復原(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "取消復原(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "偏好設定(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "離開(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "關於(_A)"
 
diff --git a/po/crh.po b/po/crh.po
index 54e6aa6..db7c1a7 100644
--- a/po/crh.po
+++ b/po/crh.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Crimean Turkish (https://www.transifex.com/mate/teams/13566/crh/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Tercihler"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Yardım"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_İçindekiler"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopyala"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Y_apıştır"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Keri yap"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Kene _yap"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Tercihler"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Çıq"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Aqqında"
 
diff --git a/po/cs.po b/po/cs.po
index 97ea7f9..af23c44 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -17,7 +17,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: LiberteCzech <[email protected]>, 2018\n"
 "Language-Team: Czech (https://www.transifex.com/mate/teams/13566/cs/)\n"
@@ -482,7 +482,7 @@ msgid "64-bit"
 msgstr "64 bitů"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Předvolby"
 
@@ -538,7 +538,7 @@ msgid "MATE Calculator"
 msgstr "MATE Kalkulačka"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulačka"
 
@@ -1199,12 +1199,12 @@ msgstr "Znaménko"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " na "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Přepnout převodní jednotky"
 
@@ -1278,7 +1278,7 @@ msgid "Displayed value not an integer"
 msgstr "Zobrazená hodnota není celé číslo"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1286,45 +1286,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stupně"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiány"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Grady"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automaticky"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Pevný"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Vědecký"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inženýrský"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Zobrazovat %d desetinných _míst"
@@ -1386,70 +1386,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulačka s finančním a vědeckým režimem."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulátor"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "Reži_m"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Nápověda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Základní"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Pokročilá"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finanční"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programátorský"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Obsah"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopírovat"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "V_ložit"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Zpět"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Zn_ovu"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Nastavení"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ukončit"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "O _aplikaci"
 
diff --git a/po/cy.po b/po/cy.po
index 350b136..f73bf68 100644
--- a/po/cy.po
+++ b/po/cy.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: ciaran, 2018\n"
 "Language-Team: Welsh (https://www.transifex.com/mate/teams/13566/cy/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Hoffterau"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Cyfrifiannell"
 
@@ -1148,12 +1148,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1227,7 +1227,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1235,45 +1235,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Awtomatig"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Gwyddonol"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1317,70 +1317,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Cyfrifiannell gyda moddau ariannol a gwyddonol."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Cyfrifiannell"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Cymorth"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Sylfaenol"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Uwch"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Ariannol"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Cynnwys"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copïo"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Gludo"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Dadwneud"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ail-wneud"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Hoffterau"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Gadael"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Ynghylch"
 
diff --git a/po/da.po b/po/da.po
index 2f5f88c..d61d6f8 100644
--- a/po/da.po
+++ b/po/da.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Joe Hansen <[email protected]>, 2018\n"
 "Language-Team: Danish (https://www.transifex.com/mate/teams/13566/da/)\n"
@@ -484,7 +484,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Præferencer"
 
@@ -541,7 +541,7 @@ msgid "MATE Calculator"
 msgstr "Mate-lommeregner"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Lommeregner"
 
@@ -1200,12 +1200,12 @@ msgstr "Fortegn"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " i "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Byt om på konverteringsenheder"
 
@@ -1279,7 +1279,7 @@ msgid "Displayed value not an integer"
 msgstr "Den viste værdi er ikke et heltal"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1287,45 +1287,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grader"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianer"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Nygrader"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatisk"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fast"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Videnskabelig"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniør"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Vis %d _decimaler"
@@ -1384,70 +1384,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Lommeregner med finansiel og videnskabelig tilstand."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Lommeregner"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Tilstand"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hjælp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basalt"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avanceret"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansiel"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmering"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Indhold"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopier"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Indsæt"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Fortryd"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Gendan"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Præferencer"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Afslut"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Om"
 
diff --git a/po/de.po b/po/de.po
index 809155e..50aece9 100644
--- a/po/de.po
+++ b/po/de.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Tobias Bannert <[email protected]>, 2018\n"
 "Language-Team: German (https://www.transifex.com/mate/teams/13566/de/)\n"
@@ -487,7 +487,7 @@ msgid "64-bit"
 msgstr "64 Bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Einstellungen"
 
@@ -545,7 +545,7 @@ msgid "MATE Calculator"
 msgstr "MATE-Taschenrechner"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Taschenrechner"
 
@@ -1204,12 +1204,12 @@ msgstr "Vorzeichen"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Umrechnungseinheiten vertauschen"
 
@@ -1283,7 +1283,7 @@ msgid "Displayed value not an integer"
 msgstr "Angezeigter Wert ist keine Ganzzahl"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1291,45 +1291,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grad"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "im Bogenmaß"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "gon"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatisch"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fest"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Wissenschaftlich"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingenieurwissenschaftlich"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d _Nachkommastellen anzeigen"
@@ -1384,70 +1384,70 @@ msgstr ""
 "Ein Taschenrechner mit finanztechnischem und wissenschaftlichem Modus."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Taschenrechner"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modus"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hilfe"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basis"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Erweitert"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finanztechnisch"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmierung"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Inhalt"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopieren"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "E_infügen"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Rückgängig"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Wiederherstellen"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Einstellungen"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Beenden"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Über"
 
diff --git a/po/dz.po b/po/dz.po
index c84d476..52846f4 100644
--- a/po/dz.po
+++ b/po/dz.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Dzongkha (https://www.transifex.com/mate/teams/13566/dz/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "དགའ་གདམ་ཚུ།"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "རྩིས་འཕྲུལ།"
 
@@ -1141,12 +1141,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1228,45 +1228,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "ཚན་རིག་གི"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1311,70 +1311,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "དངུལ་འབྲེལ་དང་ ཚན་རིག་ཐབས་ལམ་བཅས་པའི་རྩིས་འཕྲུལ།"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "རྩིས་འཕྲུལ། (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "གྲོགས་རམ།(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "གཞི་རྩ། (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "མཐོ་རིམ་ཅན། (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "དངུལ་འབྲེལ། (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "ནང་དོན།(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "འདྲ་བཤུས།(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "སྦྱར།(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "་འབད་བཤོལ།(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ལོག་འབད།(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "དགའ་གདམ་ཚུ།(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "སྤངས།  (_Q)།"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "སྐོར་ལས།(_A)"
 
diff --git a/po/el.po b/po/el.po
index 077734e..24468b4 100644
--- a/po/el.po
+++ b/po/el.po
@@ -19,7 +19,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Αλέξανδρος Καπετάνιος <[email protected]>, 2018\n"
 "Language-Team: Greek (https://www.transifex.com/mate/teams/13566/el/)\n"
@@ -490,7 +490,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Προτιμήσεις"
 
@@ -548,7 +548,7 @@ msgid "MATE Calculator"
 msgstr "Αριθμομηχανή MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Αριθμομηχανή"
 
@@ -1205,12 +1205,12 @@ msgstr "Πρόσημο"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " σε "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Αλλαγή μονάδων μετατροπής"
 
@@ -1284,7 +1284,7 @@ msgid "Displayed value not an integer"
 msgstr "Η εμφανιζόμενη τιμή δεν είναι ακέραια"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1292,45 +1292,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Μοίρες"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Ακτίνια"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Βαθμοί"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Αυτόματη"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Σταθερή"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Επιστημονική"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Τεχνολογική"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Εμφάνιση %d δεκαδικών _ψηφίων"
@@ -1392,70 +1392,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Αριθμομηχανή με εμπορικές και επιστημονικές λειτουργίες."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Αριθμομηχανή"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Λειτουργία"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Βοήθεια"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Βασική"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "Π_ροχωρημένη"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "Ε_μπορική"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Προγραμματιστική"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Περιεχόμενα"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Αντιγραφή"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Επι_κόλληση"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Αναίρεση"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Ε_πανάληψη"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Προτιμήσεις"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Έξοδος"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Πε_ρί"
 
diff --git a/po/en_AU.po b/po/en_AU.po
index 7c7e1bc..8d46406 100644
--- a/po/en_AU.po
+++ b/po/en_AU.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Michael Findlay <[email protected]>, 2018\n"
 "Language-Team: English (Australia) (https://www.transifex.com/mate/teams/13566/en_AU/)\n"
@@ -480,7 +480,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferences"
 
@@ -531,7 +531,7 @@ msgid "MATE Calculator"
 msgstr "MATE Calculator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculator"
 
@@ -1188,12 +1188,12 @@ msgstr "Sign"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Switch conversion units"
 
@@ -1267,7 +1267,7 @@ msgid "Displayed value not an integer"
 msgstr "Displayed value not an integer"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1275,45 +1275,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Degrees"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradians"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixed"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientific"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Engineering"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Show %d decimal _places"
@@ -1368,70 +1368,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculator with financial and scientific modes."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Help"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Advanced"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financial"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programming"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contents"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copy"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Paste"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Undo"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Redo"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferences"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Quit"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_About"
 
diff --git a/po/en_CA.po b/po/en_CA.po
index 3310c25..06a2ba5 100644
--- a/po/en_CA.po
+++ b/po/en_CA.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: English (Canada) (https://www.transifex.com/mate/teams/13566/en_CA/)\n"
@@ -480,7 +480,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferences"
 
@@ -531,7 +531,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculator"
 
@@ -1188,12 +1188,12 @@ msgstr "Sign"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Switch conversion units"
 
@@ -1267,7 +1267,7 @@ msgid "Displayed value not an integer"
 msgstr "Displayed value not an integer"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1275,45 +1275,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Degrees"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradians"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixed"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientific"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Engineering"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Show %d decimal _places"
@@ -1355,70 +1355,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculator with financial and scientific modes."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Help"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Advanced"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financial"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programming"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contents"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copy"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Paste"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Undo"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Redo"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferences"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Quit"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_About"
 
diff --git a/po/en_GB.po b/po/en_GB.po
index 2b4f1fe..c436a97 100644
--- a/po/en_GB.po
+++ b/po/en_GB.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Andi Chandler <[email protected]>, 2018\n"
 "Language-Team: English (United Kingdom) (https://www.transifex.com/mate/teams/13566/en_GB/)\n"
@@ -482,7 +482,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferences"
 
@@ -538,7 +538,7 @@ msgid "MATE Calculator"
 msgstr "MATE Calculator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculator"
 
@@ -1195,12 +1195,12 @@ msgstr "Sign"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Switch conversion units"
 
@@ -1274,7 +1274,7 @@ msgid "Displayed value not an integer"
 msgstr "Displayed value not an integer"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1282,45 +1282,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Degrees"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradians"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixed"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientific"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Engineering"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Show %d decimal _places"
@@ -1375,70 +1375,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculator with financial and scientific modes."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Help"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Advanced"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financial"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programming"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contents"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copy"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Paste"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Undo"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Redo"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferences"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Quit"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_About"
 
diff --git a/po/eo.po b/po/eo.po
index 053b7d2..3279622 100644
--- a/po/eo.po
+++ b/po/eo.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Cora Loftis, 2018\n"
 "Language-Team: Esperanto (https://www.transifex.com/mate/teams/13566/eo/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64-bita"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Agordoj"
 
@@ -539,7 +539,7 @@ msgid "MATE Calculator"
 msgstr "MATE Kalkulilo"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulilo"
 
@@ -1196,12 +1196,12 @@ msgstr "Signumo"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Ŝanĝi konverto-unuojn"
 
@@ -1275,7 +1275,7 @@ msgid "Displayed value not an integer"
 msgstr "Montrita valoro ne estas entjero"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1283,45 +1283,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Gradoj"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianoj"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradusoj"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Aŭtomate"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fiksita"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scienca"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inĝeniera"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Montri %d _cifer-pozicioj"
@@ -1376,70 +1376,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulilo kun financa kaj scienca opcioj."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulilo"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Reĝimo"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Helpo"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Baza"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Altnivela"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financa"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programado"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Enhavoj"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopii"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Enmeti"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Malfari"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refari"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Agordoj"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ĉesi"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Pri"
 
diff --git a/po/es.po b/po/es.po
index fc6610e..6fe9e59 100644
--- a/po/es.po
+++ b/po/es.po
@@ -19,7 +19,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Joel Barrios <[email protected]>, 2018\n"
 "Language-Team: Spanish (https://www.transifex.com/mate/teams/13566/es/)\n"
@@ -489,7 +489,7 @@ msgid "64-bit"
 msgstr "64 bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -546,7 +546,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora de MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1203,12 +1203,12 @@ msgstr "Signo"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Intercambiar unidades de conversión"
 
@@ -1282,7 +1282,7 @@ msgid "Displayed value not an integer"
 msgstr "El valor mostrado no es un entero"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1290,45 +1290,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grados"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianes"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianes"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automático"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fijo"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científico"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniería"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostrar %d deci_males"
@@ -1386,70 +1386,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora con modos científico y financiero."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modo"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Básico"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avanzado"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financiero"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programador"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contenido"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Pegar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Deshacer"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Rehacer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Salir"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_AR.po b/po/es_AR.po
index 02e8f80..03e97fc 100644
--- a/po/es_AR.po
+++ b/po/es_AR.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: mbarbero <[email protected]>, 2018\n"
 "Language-Team: Spanish (Argentina) (https://www.transifex.com/mate/teams/13566/es_AR/)\n"
@@ -459,7 +459,7 @@ msgid "64-bit"
 msgstr "64-bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -510,7 +510,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1151,12 +1151,12 @@ msgstr "Signo"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1230,7 +1230,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1238,45 +1238,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grados"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianes"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradientes"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científico"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniería"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1320,70 +1320,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_CL.po b/po/es_CL.po
index 123ac20..5a3395d 100644
--- a/po/es_CL.po
+++ b/po/es_CL.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Robert Petitpas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Chile) (https://www.transifex.com/mate/teams/13566/es_CL/)\n"
@@ -455,7 +455,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -506,7 +506,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1147,12 +1147,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1226,7 +1226,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1234,45 +1234,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_CO.po b/po/es_CO.po
index 98e3b8b..812a404 100644
--- a/po/es_CO.po
+++ b/po/es_CO.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: John Toro <[email protected]>, 2018\n"
 "Language-Team: Spanish (Colombia) (https://www.transifex.com/mate/teams/13566/es_CO/)\n"
@@ -455,7 +455,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -506,7 +506,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1147,12 +1147,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1226,7 +1226,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1234,45 +1234,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automático"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ayuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Índ_ice"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Deshacer"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Rehacer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Salir"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_CR.po b/po/es_CR.po
index fe38205..f4a2ed5 100644
--- a/po/es_CR.po
+++ b/po/es_CR.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Costa Rica) (https://www.transifex.com/mate/teams/13566/es_CR/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_DO.po b/po/es_DO.po
index b0f3562..f67b334 100644
--- a/po/es_DO.po
+++ b/po/es_DO.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Dominican Republic) (https://www.transifex.com/mate/teams/13566/es_DO/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1313,70 +1313,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_EC.po b/po/es_EC.po
index ba8fbfd..2706576 100644
--- a/po/es_EC.po
+++ b/po/es_EC.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Ecuador) (https://www.transifex.com/mate/teams/13566/es_EC/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_ES.po b/po/es_ES.po
index 4c21875..26c11c3 100644
--- a/po/es_ES.po
+++ b/po/es_ES.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Spain) (https://www.transifex.com/mate/teams/13566/es_ES/)\n"
@@ -453,7 +453,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -504,7 +504,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1145,12 +1145,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1224,7 +1224,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1232,45 +1232,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Prefere_ncias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Acerca _de"
 
diff --git a/po/es_MX.po b/po/es_MX.po
index 26a1d6c..30a2292 100644
--- a/po/es_MX.po
+++ b/po/es_MX.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Luis Medina <[email protected]>, 2018\n"
 "Language-Team: Spanish (Mexico) (https://www.transifex.com/mate/teams/13566/es_MX/)\n"
@@ -454,7 +454,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -505,7 +505,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1146,12 +1146,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1225,7 +1225,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1233,45 +1233,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1320,70 +1320,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Índice"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Salir"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_NI.po b/po/es_NI.po
index 9991871..4398d78 100644
--- a/po/es_NI.po
+++ b/po/es_NI.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Nicaragua) (https://www.transifex.com/mate/teams/13566/es_NI/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_PA.po b/po/es_PA.po
index 7cb2bf2..33a3d49 100644
--- a/po/es_PA.po
+++ b/po/es_PA.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Panama) (https://www.transifex.com/mate/teams/13566/es_PA/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_PE.po b/po/es_PE.po
index 9ae17f3..1e0462e 100644
--- a/po/es_PE.po
+++ b/po/es_PE.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Peru) (https://www.transifex.com/mate/teams/13566/es_PE/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_PR.po b/po/es_PR.po
index 33ee16f..93d64b2 100644
--- a/po/es_PR.po
+++ b/po/es_PR.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Neverest <[email protected]>, 2018\n"
 "Language-Team: Spanish (Puerto Rico) (https://www.transifex.com/mate/teams/13566/es_PR/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1313,70 +1313,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ayuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_SV.po b/po/es_SV.po
index 57760c8..1e11ba9 100644
--- a/po/es_SV.po
+++ b/po/es_SV.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (El Salvador) (https://www.transifex.com/mate/teams/13566/es_SV/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_UY.po b/po/es_UY.po
index c89a324..a415216 100644
--- a/po/es_UY.po
+++ b/po/es_UY.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Uruguay) (https://www.transifex.com/mate/teams/13566/es_UY/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/es_VE.po b/po/es_VE.po
index 5c2b2e7..62f01f3 100644
--- a/po/es_VE.po
+++ b/po/es_VE.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Spanish (Venezuela) (https://www.transifex.com/mate/teams/13566/es_VE/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Ay_uda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Acerca de"
 
diff --git a/po/et.po b/po/et.po
index 72074f3..dabe0a6 100644
--- a/po/et.po
+++ b/po/et.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Ivar Smolin <[email protected]>, 2018\n"
 "Language-Team: Estonian (https://www.transifex.com/mate/teams/13566/et/)\n"
@@ -479,7 +479,7 @@ msgid "64-bit"
 msgstr "64 bitti"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Eelistused"
 
@@ -530,7 +530,7 @@ msgid "MATE Calculator"
 msgstr "MATE kalkulaator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulaator"
 
@@ -1187,12 +1187,12 @@ msgstr "Märk"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " → "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Teisendusühikute vahetamine"
 
@@ -1266,7 +1266,7 @@ msgid "Displayed value not an integer"
 msgstr "Kuvatav väärtus ei ole täisarv"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1274,45 +1274,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Kraadid"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiaanid"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Goonid"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automaatne"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fikseeritud komakoht"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Teaduslik"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Insenerarvutused"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Näidatakse %d _kümnendkohta"
@@ -1372,70 +1372,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulaator koos finants- ja teadusarvutuste toega."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulaator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Režiim"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "A_bi"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Tavaline"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Laiendatud"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Rahandus"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmeerimine"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sisukord"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopeeri"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Aseta"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Unusta"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Taasta"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Eelistused"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Lõpeta"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Lähemalt"
 
diff --git a/po/eu.po b/po/eu.po
index 66d269b..f321c8b 100644
--- a/po/eu.po
+++ b/po/eu.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Asier Iturralde Sarasola <[email protected]>, 2018\n"
 "Language-Team: Basque (https://www.transifex.com/mate/teams/13566/eu/)\n"
@@ -481,7 +481,7 @@ msgid "64-bit"
 msgstr "64 bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Hobespenak"
 
@@ -532,7 +532,7 @@ msgid "MATE Calculator"
 msgstr "MATE kalkulagailua"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulagailua"
 
@@ -1189,12 +1189,12 @@ msgstr "Zeinua"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " honela "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Trukatu bihurketako unitateak"
 
@@ -1268,7 +1268,7 @@ msgid "Displayed value not an integer"
 msgstr "Bistaratutako balioa ez da osoko bat"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1276,45 +1276,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graduak"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianak"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianak"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatikoa"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Finkatuta"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Zientifikoa"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniaritza"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Erakutsi dezimalen %d _posizio"
@@ -1358,70 +1358,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Modu finantzarioa eta zientifikoa dituen kalkulagailua."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulagailua"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modua"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Laguntza"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Oinarrizkoa"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Aurreratua"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finantzarioa"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programazioa"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Edukia"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiatu"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Itsatsi"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Desegin"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Berregin"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Hobespenak"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Irten"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Honi _buruz"
 
diff --git a/po/fa.po b/po/fa.po
index b66e2c9..e90fd22 100644
--- a/po/fa.po
+++ b/po/fa.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Mahdi Pourghasem <[email protected]>, 2018\n"
 "Language-Team: Persian (https://www.transifex.com/mate/teams/13566/fa/)\n"
@@ -455,7 +455,7 @@ msgid "64-bit"
 msgstr "۶۴ بیت"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "تنظیمات"
 
@@ -506,7 +506,7 @@ msgid "MATE Calculator"
 msgstr "ماشین حساب MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ماشین‌حساب"
 
@@ -1163,12 +1163,12 @@ msgstr "Sign"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "تعویض واحدهای تبدیل"
 
@@ -1242,7 +1242,7 @@ msgid "Displayed value not an integer"
 msgstr "عبارت نمایش داده شده عدد صحیح نیست"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "۰,۱,۲,۳,۴,۵,۶,۷,۸,۹,A,B,C,D,E,F"
 
@@ -1250,45 +1250,45 @@ msgstr "۰,۱,۲,۳,۴,۵,۶,۷,۸,۹,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "درجه"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "رادیان"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "گرادیان"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "خودکار"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ثابت"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "علمی"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "مهندسی"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "نمایش %Id رقم _اعشاری"
@@ -1330,70 +1330,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ماشین‌حساب با حالت‌های مالی و علمی."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_ماشین‌حساب"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_حالت"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_راهنما"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ا_بتدایی"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_پیشرفته"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_مالی"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_برنامه‌نویسی"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_محتویات"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_نسخه‌برداری"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "چسباندن"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "ب_رگردان"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_دوباره"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_ترجیحات"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_ترک"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_درباره"
 
diff --git a/po/fi.po b/po/fi.po
index 88cd988..7514e0f 100644
--- a/po/fi.po
+++ b/po/fi.po
@@ -17,7 +17,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Ammuu5, 2018\n"
 "Language-Team: Finnish (https://www.transifex.com/mate/teams/13566/fi/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64-bittinen"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Asetukset"
 
@@ -534,7 +534,7 @@ msgid "MATE Calculator"
 msgstr "MATE Laskin"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Laskin"
 
@@ -1189,12 +1189,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1268,7 +1268,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1276,45 +1276,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Asteet"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiaania"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiaanit"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automaattinen"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Tiede"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Insinööri"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1361,70 +1361,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Laskin talous- ja tiedetilojen kera"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Laskin"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Tila"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ohje"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Perustila"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Edistynyt"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Taloustila"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Ohjelmointi"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sisältö"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopioi"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "L_iitä"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Kumoa"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Tee _uudelleen"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Asetukset"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Lopeta"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Tietoja"
 
diff --git a/po/fr.po b/po/fr.po
index 041f08d..e2e823b 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Charles Monzat <[email protected]>, 2018\n"
 "Language-Team: French (https://www.transifex.com/mate/teams/13566/fr/)\n"
@@ -485,7 +485,7 @@ msgid "64-bit"
 msgstr "64 bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Préférences"
 
@@ -543,7 +543,7 @@ msgid "MATE Calculator"
 msgstr "Calculatrice de MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculatrice"
 
@@ -1200,12 +1200,12 @@ msgstr "Signe"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Inverse les unités de conversion"
 
@@ -1279,7 +1279,7 @@ msgid "Displayed value not an integer"
 msgstr "La valeur affichée n'est pas un entier"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1287,45 +1287,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Degrés"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Grades"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatique"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixe"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientifique"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingénierie"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Afficher %d dé_cimales"
@@ -1392,70 +1392,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculatrice avec des modes financiers et scientifiques."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculatrice"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Aide"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basique"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avancé"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financier"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmation"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sommaire"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copier"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "C_oller"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "A_nnuler"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Restaurer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Préférences"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Quitter"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_À propos"
 
diff --git a/po/frp.po b/po/frp.po
index 5bbc362..6258af9 100644
--- a/po/frp.po
+++ b/po/frp.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Alexandre Raymond, 2018\n"
 "Language-Team: Franco-Provençal (Arpitan) (https://www.transifex.com/mate/teams/13566/frp/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Prèfèrences"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr ""
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Dèfâre"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refâre"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Prèfèrences"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr ""
 
diff --git a/po/fur.po b/po/fur.po
index ee9dfe5..bb2da79 100644
--- a/po/fur.po
+++ b/po/fur.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Friulian (https://www.transifex.com/mate/teams/13566/fur/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencis"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Jutori"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Somari"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Cupie"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Tache"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Anule"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ripet"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencis"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Jes"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Informazions"
 
diff --git a/po/fy.po b/po/fy.po
index 8369e2f..78a8431 100644
--- a/po/fy.po
+++ b/po/fy.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Western Frisian (https://www.transifex.com/mate/teams/13566/fy/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Ynstellingen"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Help"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Ynhâld"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Ûngedien meitsje"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Foarkarren"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Oer"
 
diff --git a/po/ga.po b/po/ga.po
index a2e0ac8..1946644 100644
--- a/po/ga.po
+++ b/po/ga.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Irish (https://www.transifex.com/mate/teams/13566/ga/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Sainroghanna"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Áireamhán"
 
@@ -1149,12 +1149,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1228,7 +1228,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1236,45 +1236,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Uathoibríoch"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Eolaíoch"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1319,70 +1319,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "Á_ireamhán"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Cab_hair"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Bunúsach"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Casta"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Airgeadúil"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Ríomhchlárú"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Inneachar"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Cóipeáil"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "G_reamaigh"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Cealaigh"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Athfheidhmigh"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Sainroghanna"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Scoi_r"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Maidir Leis Seo"
 
diff --git a/po/gl.po b/po/gl.po
index 6fcd4c5..0f4dd5c 100644
--- a/po/gl.po
+++ b/po/gl.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: André Rivero Castillo <[email protected]>, 2018\n"
 "Language-Team: Galician (https://www.transifex.com/mate/teams/13566/gl/)\n"
@@ -484,7 +484,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencias"
 
@@ -541,7 +541,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1198,12 +1198,12 @@ msgstr "Signo"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Cambiar unidades de conversión"
 
@@ -1277,7 +1277,7 @@ msgid "Displayed value not an integer"
 msgstr "O valor amosado non é un enteiro "
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1285,45 +1285,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graos"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiáns"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiáns"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automático"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixado"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científico"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Enxeñaría"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Amosar %d _posicións decimais"
@@ -1383,70 +1383,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora con modo financeiro e científico."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modo"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Axuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Básico"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avanzado"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financeiro"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programación"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Contidos"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Pegar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Desfacer"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refacer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferencias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Saír"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Sobre"
 
diff --git a/po/gu.po b/po/gu.po
index 79de297..afba586 100644
--- a/po/gu.po
+++ b/po/gu.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Gujarati (https://www.transifex.com/mate/teams/13566/gu/)\n"
@@ -476,7 +476,7 @@ msgid "64-bit"
 msgstr "64-બીટ"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "પસંદગીઓ"
 
@@ -527,7 +527,7 @@ msgid "MATE Calculator"
 msgstr "મેટ કૅલ્ક્યુલેટર"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "કૅલ્ક્યુલેટર"
 
@@ -1184,12 +1184,12 @@ msgstr "હસ્તાક્ષર"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " માં "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "પરિવર્તન એકમોને બદલો"
 
@@ -1263,7 +1263,7 @@ msgid "Displayed value not an integer"
 msgstr "દર્શાવેલ કિંમત પૂર્ણાંક નથી"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1271,45 +1271,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "અંશ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "રેડિયન"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ઢાળ"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "આપમેળે"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ચોક્કસ"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "વૈજ્ઞાનિક"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "એંજિનીયરીંગ"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d દશાંશ સ્થળોને બતાવો (_p)"
@@ -1351,70 +1351,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "આર્થિક અને વૈજ્ઞાનિક સ્થિતિઓ સાથેનુ કૅલ્ક્યુલેટર."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "કૅલ્ક્યુલેટર (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "મદદ (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "આધારભૂત (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "અદ્યતન (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "આર્થિક (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "પ્રોગ્રામીંગ (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "સમાવિષ્ટો (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "નકલ કરો (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ચોંટાડો (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "છેલ્લી પ્રક્રિયાને રદ કરો (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ફરીથી કરો (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "પસંદગીઓ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "બહાર નીકળો (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "વિશે (_A)"
 
diff --git a/po/ha.po b/po/ha.po
index 2b7edf0..6efb784 100644
--- a/po/ha.po
+++ b/po/ha.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Hausa (https://www.transifex.com/mate/teams/13566/ha/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Fifiko"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Taimako"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Kayan Ciki"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Warware"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Fifiko"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Game da"
 
diff --git a/po/he.po b/po/he.po
index a7d8495..2118ca4 100644
--- a/po/he.po
+++ b/po/he.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: shy tzedaka <[email protected]>, 2018\n"
 "Language-Team: Hebrew (https://www.transifex.com/mate/teams/13566/he/)\n"
@@ -476,7 +476,7 @@ msgid "64-bit"
 msgstr "64-סיביות"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "העדפות"
 
@@ -527,7 +527,7 @@ msgid "MATE Calculator"
 msgstr "המחשבון של MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "מחשבון"
 
@@ -1188,12 +1188,12 @@ msgstr "סימן"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " תחת "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "החלפת יחידות ההמרה"
 
@@ -1267,7 +1267,7 @@ msgid "Displayed value not an integer"
 msgstr "הערך המוצג איננו שלם חיובי"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1275,45 +1275,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "מעלות"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "רדיאנים"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "גראדיאנים"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "אוטומטי"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "קבועה"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "מדעי"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "הנדסה"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "הצגת %d _מקומות עשרוניים"
@@ -1355,70 +1355,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "מחשבון עם מצבים פיננסיים ומדעיים"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_מחשבון"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_מצב"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ע_זרה"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_בסיסי"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_מתקדם"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_פיננסי"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_תכנות"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_תוכן עניינים"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "ה_עתק"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ה_דבק"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_בטל"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_ביצוע שוב"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "ה_עדפות"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_יציאה"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "על _אודות"
 
diff --git a/po/hi.po b/po/hi.po
index 9a54fdc..9c10150 100644
--- a/po/hi.po
+++ b/po/hi.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Sadgamaya <[email protected]>, 2018\n"
 "Language-Team: Hindi (https://www.transifex.com/mate/teams/13566/hi/)\n"
@@ -480,7 +480,7 @@ msgid "64-bit"
 msgstr "64-बिट"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "वरीयताएँ"
 
@@ -531,7 +531,7 @@ msgid "MATE Calculator"
 msgstr "माटे कैल्क्यलेटर"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "गणक"
 
@@ -1188,12 +1188,12 @@ msgstr "हस्ताक्षर करें"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " में "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "रूपांतरण इकाई बदलें"
 
@@ -1267,7 +1267,7 @@ msgid "Displayed value not an integer"
 msgstr "दिखाया गया मान पूर्णांक नहीं"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1275,45 +1275,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "डिग्री"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "रेडियन"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ग्रेडियन"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "स्वचालित"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "स्थिर"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "वैज्ञानिक"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "इंजीनियरिंग"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d दशमलव स्थान तक दिखाएँ (_p)"
@@ -1364,70 +1364,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "वित्त और वैज्ञानिक मोड वाला गणक"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "गणक (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_मोड़"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "मदद (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "मौलिक (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "उन्नत (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "वित्तिय (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "प्रोग्रामिंग (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "विषय सूची (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "प्रतिलिपि (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "चिपकाएँ (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "पहले जैसा (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "फिर करें (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "वरीयताएँ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "बाहर जाएँ (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "परिचय (_A)"
 
diff --git a/po/hr.po b/po/hr.po
index 63c181c..9f1a540 100644
--- a/po/hr.po
+++ b/po/hr.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Elvis M. Lukšić <[email protected]>, 2018\n"
 "Language-Team: Croatian (https://www.transifex.com/mate/teams/13566/hr/)\n"
@@ -454,7 +454,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Prilagodbe"
 
@@ -505,7 +505,7 @@ msgid "MATE Calculator"
 msgstr "MATE kalkulator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1148,12 +1148,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1227,7 +1227,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1235,45 +1235,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stupnjevi"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radijani"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatski"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Znanstveni način"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1338,70 +1338,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator sa financijskim i naučnim načinom rada."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Način rada"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Pomoć"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Napredno"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sadržaj"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiraj"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Zalijepi"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Poništi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ponovi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Prilagodbe"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Završi"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_O programu"
 
diff --git a/po/hu.po b/po/hu.po
index a1a9b14..fe66798 100644
--- a/po/hu.po
+++ b/po/hu.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Rezső Páder <[email protected]>, 2018\n"
 "Language-Team: Hungarian (https://www.transifex.com/mate/teams/13566/hu/)\n"
@@ -486,7 +486,7 @@ msgid "64-bit"
 msgstr "64 bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Beállítások"
 
@@ -543,7 +543,7 @@ msgid "MATE Calculator"
 msgstr "MATE számológép"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Számológép"
 
@@ -1201,12 +1201,12 @@ msgstr "Előjel"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " ebben: "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Mértékegységek cseréje"
 
@@ -1280,7 +1280,7 @@ msgid "Displayed value not an integer"
 msgstr "A megjelenített érték nem egész"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1288,45 +1288,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Fok"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radián"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradián"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatikus"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Rögzített"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Tudományos mód"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Műszaki"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d decimális _hely megjelenítése"
@@ -1389,70 +1389,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Számológép pénzügyi és tudományos üzemmódokkal."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Számológép"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mód"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Súgó"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Alap"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Speciális"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Pénzügyi"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programozói"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Tartalom"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Másolás"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Beillesztés"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Visszavonás"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Mé_gis"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Beállítások"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Kilépés"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Névjegy"
 
diff --git a/po/hy.po b/po/hy.po
index 2ee3834..f68faef 100644
--- a/po/hy.po
+++ b/po/hy.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Davit Mayilyan <[email protected]>, 2018\n"
 "Language-Team: Armenian (https://www.transifex.com/mate/teams/13566/hy/)\n"
@@ -477,7 +477,7 @@ msgid "64-bit"
 msgstr "64-բիտ"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Հատկություններ"
 
@@ -528,7 +528,7 @@ msgid "MATE Calculator"
 msgstr "MATE Հաշվիչ"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Հաշվիչ"
 
@@ -1185,12 +1185,12 @@ msgstr "Ստորագրել"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "դյմ"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Անջատել փոխարկման միավորները"
 
@@ -1264,7 +1264,7 @@ msgid "Displayed value not an integer"
 msgstr "Ցուցադրեց արժեք աչ ամբողջաթիվ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1272,45 +1272,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Աստիճաններ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Ռադիաններ"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Գռադիաններ"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Ավտոմատ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Ֆիքսված է"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Գիտական"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ճարտարագիտություն"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Ցույց տալ %d տասնորդական _վայրերը"
@@ -1365,70 +1365,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Հաշվիչ գիտական և ֆինանսական ռեժիմներով։"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Հաշվիչ"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Ռեժիմ"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Օգնություն"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "Հ_իմնական"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Ընդլայնված"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Ֆինանսական"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Ծրագրավորման"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Բովանդակություն"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Պատճեն"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Փակցնել"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Հետադարձել"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Կրկնել"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Նախընտրանքներ"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ելք"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Մասին"
 
diff --git a/po/id.po b/po/id.po
index dde93f5..302601c 100644
--- a/po/id.po
+++ b/po/id.po
@@ -18,7 +18,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Andika Triwidada <[email protected]>, 2018\n"
 "Language-Team: Indonesian (https://www.transifex.com/mate/teams/13566/id/)\n"
@@ -487,7 +487,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferensi"
 
@@ -544,7 +544,7 @@ msgid "MATE Calculator"
 msgstr "MATE Calculator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1199,12 +1199,12 @@ msgstr "Tanda"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " dalam "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Berpindah unit konversi"
 
@@ -1278,7 +1278,7 @@ msgid "Displayed value not an integer"
 msgstr "Nilai yang ditampilkan bukan integer"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1286,45 +1286,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Derajat"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radian"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradian"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Otomatis"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Tetap"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Ilmiah"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Teknik"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Tam_pilkan %d angka di belakang koma"
@@ -1383,70 +1383,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator dengan model keuangan dan ilmuwan"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mode"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Bantuan"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Dasar"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "L_anjutan"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansial"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Pemrograman"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Isi"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Salin"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Tem_pel"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Tak Jadi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Jadi Lagi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferensi"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Keluar"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Tentang"
 
diff --git a/po/ig.po b/po/ig.po
index 0030846..24fac33 100644
--- a/po/ig.po
+++ b/po/ig.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Igbo (https://www.transifex.com/mate/teams/13566/ig/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Nkarachọ"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1141,12 +1141,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1228,45 +1228,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1308,70 +1308,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Nnyemaka"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Ndịna ndị ahụ"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Nweghachi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Nkarachọ"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Maka "
 
diff --git a/po/is.po b/po/is.po
index ce2a053..f4c10d1 100644
--- a/po/is.po
+++ b/po/is.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Icelandic (https://www.transifex.com/mate/teams/13566/is/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Kjörstillingar"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hjálp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Innihald"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Afrita"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Líma"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Afturkalla"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Endurgera"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Stillingar"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Hætta"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Um"
 
diff --git a/po/it.po b/po/it.po
index ec4f3b5..04a1bb8 100644
--- a/po/it.po
+++ b/po/it.po
@@ -10,15 +10,16 @@
 # Stefano Karapetsas <[email protected]>, 2018
 # Dario Di Nucci <[email protected]>, 2018
 # Giuseppe Pignataro (Fastbyte01) <[email protected]>, 2018
+# Enrico B. <[email protected]>, 2019
 # 
 #, fuzzy
 msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
-"Last-Translator: Giuseppe Pignataro (Fastbyte01) <[email protected]>, 2018\n"
+"Last-Translator: Enrico B. <[email protected]>, 2019\n"
 "Language-Team: Italian (https://www.transifex.com/mate/teams/13566/it/)\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -486,7 +487,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferenze"
 
@@ -542,7 +543,7 @@ msgid "MATE Calculator"
 msgstr "Calcolatrice di MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calcolatrice"
 
@@ -1165,8 +1166,8 @@ msgstr "Esadecimale"
 #, c-format
 msgid "_%d place"
 msgid_plural "_%d places"
-msgstr[0] ""
-msgstr[1] ""
+msgstr[0] "_%d posto"
+msgstr[1] "_%d posti"
 
 #. Left Shift Popup: Menu item to shift left by n places (n >= 10)
 #. Right Shift Popup: Menu item to shift right by n places (n >= 10)
@@ -1174,8 +1175,8 @@ msgstr[1] ""
 #, c-format
 msgid "%d place"
 msgid_plural "%d places"
-msgstr[0] ""
-msgstr[1] ""
+msgstr[0] "%d posto"
+msgstr[1] "%d posti"
 
 #. Tooltip for the round button
 #: ../src/math-buttons.c:996
@@ -1199,12 +1200,12 @@ msgstr "Segno"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Inverte l'unità di conversione"
 
@@ -1278,7 +1279,7 @@ msgid "Displayed value not an integer"
 msgstr "Il valore visualizzato non è un intero"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1286,45 +1287,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Gradi"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianti"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradienti"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatico"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fisso"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientifico"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingegneristico"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostrare %d _posizioni decimali"
@@ -1379,70 +1380,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calcolatrice con modalità finanziaria e scientifica."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calcolatrice"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modalità"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Aiuto"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Base"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avanzata"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finanziaria"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmazione"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Sommario"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copia"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Incolla"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Annulla"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ripeti"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferenze"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Esci"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Informazioni"
 
diff --git a/po/ja.po b/po/ja.po
index 9949591..8345039 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -18,7 +18,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: ABE Tsunehiko, 2018\n"
 "Language-Team: Japanese (https://www.transifex.com/mate/teams/13566/ja/)\n"
@@ -463,7 +463,7 @@ msgid "64-bit"
 msgstr "64ビット"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "設定"
 
@@ -514,7 +514,7 @@ msgid "MATE Calculator"
 msgstr "MATE 電卓"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "電卓"
 
@@ -1169,12 +1169,12 @@ msgstr "符号"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "単位変換を切り替える"
 
@@ -1248,7 +1248,7 @@ msgid "Displayed value not an integer"
 msgstr "整数以外の値を表示します"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1256,45 +1256,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "度"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ラジアン"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "グラード"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "自動"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "固定小数点"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "科学"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "工学"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "小数点以下第 %d 位まで表示 (_P)"
@@ -1358,70 +1358,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "財務と科学計算のモードを持つ電卓です。"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "計算機(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "モード(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ヘルプ(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "基本(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "拡張(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "財務(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "プログラミング(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "目次(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "コピー(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "貼り付け(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "元に戻す(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "やり直す(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "設定(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "終了 (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "情報(_A)"
 
diff --git a/po/ka.po b/po/ka.po
index 6c62df5..d29dbfa 100644
--- a/po/ka.po
+++ b/po/ka.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Georgian (https://www.transifex.com/mate/teams/13566/ka/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "პარამეტრები"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "კალკულატორი"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "სამეცნიერო"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "კალკულატორი ფინანსური და სამეცნიერო რეჟიმებით"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_კალკულატორი"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_დახმარება"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_მარტივი"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_დამატებითი"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_ფინანსური"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_შინაარსი"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_კოპირება"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ჩა_სმა"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "გა_უქმება"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "გამეო_რება"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_პარამეტრები"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_გასვლა"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_შესახებ"
 
diff --git a/po/kk.po b/po/kk.po
index c12db16..269ced1 100644
--- a/po/kk.po
+++ b/po/kk.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Baurzhan Muftakhidinov <[email protected]>, 2018\n"
 "Language-Team: Kazakh (https://www.transifex.com/mate/teams/13566/kk/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr "64 бит"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Баптаулар"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr "MATE калькуляторы"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калькулятор"
 
@@ -1144,12 +1144,12 @@ msgstr "Қолтаңба"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr "Көрсетілген шама бүтін емес"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1231,45 +1231,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Градустар"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радиандар"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Градтар"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Автоматты"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Бекітілген"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Ғылыми"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Инжинерлік"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Үтірден кейін %d _санды көрсету"
@@ -1311,70 +1311,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Қаржылық және ғылыми режимдері бар калькулятор."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калькулятор"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режимі"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Көм_ек"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "Қарапа_йым"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "Кеңейтіл_ген"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "Қар_жылық"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "Бағдарл_амалау"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Құра_масы"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Көшіру"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Кірі_стіру"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Бол_дырмау"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Қай_талау"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Баптаулар"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Шығу"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "О_сы туралы"
 
diff --git a/po/km.po b/po/km.po
index 2dbae46..af7123c 100644
--- a/po/km.po
+++ b/po/km.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Khmer (https://www.transifex.com/mate/teams/13566/km/)\n"
@@ -481,7 +481,7 @@ msgid "64-bit"
 msgstr "៦៤​ ប៊ីត"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ចំណូល​ចិត្ត"
 
@@ -532,7 +532,7 @@ msgid "MATE Calculator"
 msgstr "ម៉ាស៊ីនគិតលេខ MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ម៉ាស៊ីន​គិត​លេខ"
 
@@ -1187,12 +1187,12 @@ msgstr "ចុះហត្ថលេខា"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "ក្នុង"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "ប្ដូរ​ឯកតា​ការ​បម្លែង"
 
@@ -1266,7 +1266,7 @@ msgid "Displayed value not an integer"
 msgstr "គ្មាន​តម្លៃ​លេខគត់​​​ដែល​បាន​បង្ហាញ​ឡើយ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1274,45 +1274,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ដឺក្រេ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "រ៉ាដ្យង់"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradians"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ស្វ័យប្រវត្តិ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ថេរ"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "វិទ្យាសាស្ត្រ"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "វិស្វកម្ម"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "បង្ហាញ​​ការ​ដាក់​ទសភាគ %d"
@@ -1354,70 +1354,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ម៉ាស៊ីន​គិតលេខ​ដែល​មាន​របៀប​វិទ្យាសាស្ត្រ និង​​របៀប​ហិរញ្ញវត្ថុ"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ម៉ាស៊ីន​គិតលេខ"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "របៀប"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ជំនួយ"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ជា​គោល"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "កម្រិត​ខ្ពស់"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "ហិរញ្ញវត្ថុ"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "ការ​សរសេរ​កម្មវិធី"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "មាតិកា"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_អំពី"
 
diff --git a/po/kn.po b/po/kn.po
index 27b88ac..962121d 100644
--- a/po/kn.po
+++ b/po/kn.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Kannada (https://www.transifex.com/mate/teams/13566/kn/)\n"
@@ -481,7 +481,7 @@ msgid "64-bit"
 msgstr "೬೪-ಬಿಟ್"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ಆದ್ಯತೆಗಳು"
 
@@ -532,7 +532,7 @@ msgid "MATE Calculator"
 msgstr "ಮೇಟ್ ಕ್ಯಾಲ್ಕುಲೇಟರ್"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ಕ್ಯಾಲ್ಕುಲೇಟರ್"
 
@@ -1189,12 +1189,12 @@ msgstr "ಸಂಕೇತ"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ", ಇದರಲ್ಲಿ"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "ಪರಿವರ್ತನೆ ಏಕಮಾನಗಳನ್ನು ಬದಲಾಯಿಸು"
 
@@ -1268,7 +1268,7 @@ msgid "Displayed value not an integer"
 msgstr "ತೋರಿಸಲಾದ ಮೌಲ್ಯವು ಪೂರ್ಣಾಂಕವಾಗಿಲ್ಲ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1276,45 +1276,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ಡಿಗ್ರಿಗಳು"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ರೇಡಿಯನ್‌ಗಳು"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ಗ್ರೇಡಿಯನ್‌ಗಳು"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ಸ್ವಯಂಚಾಲಿತ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ನಿಶ್ಚಿತ"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "ವೈಜ್ಞಾನಿಕ"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ಇಂಜಿನೀಯರಿಂಗ್"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d ದಶಾಂಶ ಸ್ಥಾನಗಳನ್ನು ತೋರಿಸು (_p)"
@@ -1357,70 +1357,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ಹಣಕಾಸು ಹಾಗು ವೈಜ್ಞಾನಿಕ ಕ್ರಮಗಳನ್ನು ಹೊಂದಿರುವ ಕ್ಯಾಲ್ಕುಲೇಟರ್."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ಕ್ಯಾಲ್ಕುಲೇಟರ್(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "ಕ್ರಮ(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ನೆರವು(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ಸರಳ(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "ಸುಧಾರಿತ(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "ಹಣಕಾಸು(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "ಪ್ರೊಗ್ರಾಮಿಂಗ್(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "ವಿಷಯಗಳು(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "ಕಾಪಿ ಮಾಡು(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ಅಂಟಿಸು(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "ರದ್ದು ಮಾಡು(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ಮತ್ತೊಮ್ಮೆ ಮಾಡು(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "ಆದ್ಯತೆಗಳು(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "ಹೊರನಡೆ(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "ಇದರ ಬಗ್ಗೆ(_A)"
 
diff --git a/po/ko.po b/po/ko.po
index 3fd0505..09982cf 100644
--- a/po/ko.po
+++ b/po/ko.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: 박정규(Jung-Kyu Park) <[email protected]>, 2018\n"
 "Language-Team: Korean (https://www.transifex.com/mate/teams/13566/ko/)\n"
@@ -459,7 +459,7 @@ msgid "64-bit"
 msgstr "64비트"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "기본 설정"
 
@@ -513,7 +513,7 @@ msgid "MATE Calculator"
 msgstr "마테 계산기 "
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "계산기"
 
@@ -1168,12 +1168,12 @@ msgstr "부호"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " -> "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "변환 단위 바꾸기"
 
@@ -1247,7 +1247,7 @@ msgid "Displayed value not an integer"
 msgstr "표시 중인 값이 정수가 아닙니다"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1255,45 +1255,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "육십분"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "라디안"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "그라디안"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "자동"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "고정"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "과학"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "공학"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d자리 십진수 표시(_P)"
@@ -1346,70 +1346,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "재무 및 과학 모드가 지원되는 계산기."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "계산기(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "종류(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "도움말(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "기본(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "고급(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "재무(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "프로그래밍(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "콘텐츠(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "복사(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "붙여넣기(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "실행 취소(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "재실행(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "기본 설정(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "끝내기(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "정보(_A)"
 
diff --git a/po/ks.po b/po/ks.po
index f0def65..5a2a3d8 100644
--- a/po/ks.po
+++ b/po/ks.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Kashmiri (https://www.transifex.com/mate/teams/13566/ks/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "मदद (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "मंज (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "फेरिव (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "बारे मंज (_A)"
 
diff --git a/po/ku.po b/po/ku.po
index 9a8ff09..9025a4e 100644
--- a/po/ku.po
+++ b/po/ku.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Kurdish (https://www.transifex.com/mate/teams/13566/ku/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Vebijêrk"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Zanistî"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Alîkarî"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Bingehîn"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Pêşketî"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Malî"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Naverok"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Ji ber bigire"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Pê veke"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Vegerîne"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Dîsa bike"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Vebijêrk"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Derkeve"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Der barê"
 
diff --git a/po/ku_IQ.po b/po/ku_IQ.po
index 77eb8c8..8da3535 100644
--- a/po/ku_IQ.po
+++ b/po/ku_IQ.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Rasti K5 <[email protected]>, 2018\n"
 "Language-Team: Kurdish (Iraq) (https://www.transifex.com/mate/teams/13566/ku_IQ/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr "64-بیت"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "هەڵبژاردنەکان"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr "ژمێرەری MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ژمێرەر"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "پلە"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ڕادیەن(گۆشەی نیوەتیرەیی)"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "خۆکار"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "زانستی"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ئەندازیاری"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_بژمێر"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_یارمەتی"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_سەرەتایی"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_پێشکەوتوو"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_بەرنامەسازی"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_ناوەڕۆک"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_لەبەرگرتنەوە"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_هەڵبژاردەکان"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_دەرچوون"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_دەربارە"
 
diff --git a/po/ky.po b/po/ky.po
index 232e5fe..a133ee7 100644
--- a/po/ky.po
+++ b/po/ky.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: chingis, 2018\n"
 "Language-Team: Kyrgyz (https://www.transifex.com/mate/teams/13566/ky/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr "64 бит"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Ырастоолор"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr "MATE калькулятору"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калькулятор"
 
@@ -1141,12 +1141,12 @@ msgstr "Белги"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "->"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1228,45 +1228,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Градус"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радиан"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Град"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Автоматтык"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Илимий"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Инженердик"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d ондук _разрядды көрсөтүү"
@@ -1308,70 +1308,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калькулятор"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Жардам"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Жөнөкөй"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Кеңейтилген"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "Ка_ржы"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Программалоо"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Мазмундар"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Көчүрүү"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "К_оюу"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Жокко чыгаруу"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Кайтаруу"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Ырастоолор"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Чыгуу"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Программа _жөнүндө"
 
diff --git a/po/li.po b/po/li.po
index 0b4402c..bb1d0d9 100644
--- a/po/li.po
+++ b/po/li.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Limburgian (https://www.transifex.com/mate/teams/13566/li/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hulp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Inhaud"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiëre"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Plakke"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Óngeda_on make"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "He_rhaole"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Beèndige"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Euver"
 
diff --git a/po/lt.po b/po/lt.po
index cb5969d..69e2341 100644
--- a/po/lt.po
+++ b/po/lt.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Moo, 2018\n"
 "Language-Team: Lithuanian (https://www.transifex.com/mate/teams/13566/lt/)\n"
@@ -480,7 +480,7 @@ msgid "64-bit"
 msgstr "64 bitai"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Nustatymai"
 
@@ -538,7 +538,7 @@ msgid "MATE Calculator"
 msgstr "MATE skaičiuotuvas"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Skaičiuotuvas"
 
@@ -1199,12 +1199,12 @@ msgstr "Ženklas"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " į "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Sukeisti vertimo vienetus"
 
@@ -1278,7 +1278,7 @@ msgid "Displayed value not an integer"
 msgstr "Rodoma reikšmė nėra sveikas skaičius"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1286,45 +1286,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Laipsniai"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianai"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradientai"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatinis"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fiks"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Mokslinis"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inžinerinis"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Rodyti %d dešimtainių _pozicijų"
@@ -1389,70 +1389,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Skaičiuotuvas su finansiniais bei moksliniais priedais"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Skaičiuotuvas"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Režimas"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Žinynas"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Paprastas"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Sudėtingesnis"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansinis"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programuojamasis"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Turinys"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopijuoti"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Į_dėti"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Atša_ukti"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Pakartoti"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Nustatymai"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Iš_eiti"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Apie"
 
diff --git a/po/lv.po b/po/lv.po
index 739dcf8..04ae088 100644
--- a/po/lv.po
+++ b/po/lv.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: ciba43 <[email protected]>, 2018\n"
 "Language-Team: Latvian (https://www.transifex.com/mate/teams/13566/lv/)\n"
@@ -480,7 +480,7 @@ msgid "64-bit"
 msgstr "64 biti"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Iestatījumi"
 
@@ -531,7 +531,7 @@ msgid "MATE Calculator"
 msgstr "MATE Kalkulators"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulators"
 
@@ -1190,12 +1190,12 @@ msgstr "Zīme"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " izteikts "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Pārslēgt konversijas vienības"
 
@@ -1269,7 +1269,7 @@ msgid "Displayed value not an integer"
 msgstr "Attēlotā vērtība nav vesels skaitlis"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1277,45 +1277,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grādi"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiāni"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiāni"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automātisks"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fiksēts"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Zinātniskais"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inženierijas"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Rādīt %d ci_parus aiz komata"
@@ -1371,70 +1371,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulators ar finansiālo un zinātnisko režīmu."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulators"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Režīms"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Palīdzība"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Vienkāršais"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "P_aplašinātais"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansiālais"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmēšanas"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Saturs"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopēt"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Izlikt"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Atsaukt"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Pāratsaukt"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Iestatījumi"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Iziet"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "P_ar"
 
diff --git a/po/mai.po b/po/mai.po
index ca75797..cca738a 100644
--- a/po/mai.po
+++ b/po/mai.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Maithili (https://www.transifex.com/mate/teams/13566/mai/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "वरीयतासभ"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "कैलकुलेटर"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "वैज्ञानिक"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "वित्तीय आओर वैज्ञानिक मोड बला कैलकुलेटर"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "कैलकुलेटर (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "मद्दति (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "मौलिक (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "उन्नत (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "वित्तीय (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "विषय सूची (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "कॉपी करू (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "साटू (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "पूर्ववत् करू (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "दोहराबू (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "वरीयतासभ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "बाहर (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "क' संबंधमे (_A)"
 
diff --git a/po/mg.po b/po/mg.po
index 0fd8cc2..10b7148 100644
--- a/po/mg.po
+++ b/po/mg.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Malagasy (https://www.transifex.com/mate/teams/13566/mg/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Safidy"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Milina mpikajy"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Siantifika"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Milina mpikajy misy fikajiana ara-bola sy siantifika."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Milina mpikajy"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Toro-làlana"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Fototra"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avo lenta"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Ara-bola"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Mpiaty"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Adikao"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Apetao"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Foano"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Avereno"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Safidy manokana"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ajanony"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Mombamomba"
 
diff --git a/po/mi.po b/po/mi.po
index 5e6a0dc..640860c 100644
--- a/po/mi.po
+++ b/po/mi.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Maori (https://www.transifex.com/mate/teams/13566/mi/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Ngā tina hiahia"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Āwhina"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Ngā kai"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Tārua"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Whakapiri"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Whakakore"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Mahi Anō"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Whakamutu"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Mo"
 
diff --git a/po/mk.po b/po/mk.po
index 77e5daf..f4f8adf 100644
--- a/po/mk.po
+++ b/po/mk.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Macedonian (https://www.transifex.com/mate/teams/13566/mk/)\n"
@@ -474,7 +474,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Параметри"
 
@@ -525,7 +525,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калкулатор"
 
@@ -1182,12 +1182,12 @@ msgstr "Знак"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "во"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Смени ги единиците за конверзија"
 
@@ -1261,7 +1261,7 @@ msgid "Displayed value not an integer"
 msgstr "Прикажаната вредност не е целобројна"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1269,45 +1269,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Степени"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радијани"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Градуси"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Автоматски"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Фиксен"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Научен"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Инженерски"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Покажи %d децимални _места"
@@ -1349,70 +1349,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Калкулатор со финансиски и научен режим на работа."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калкулатор"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Помош"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Основен"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Напреден"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Финансиски"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Програмирање"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Содржина"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Копирај"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Вметни"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Врати"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Повтори"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Параметри"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Излез"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_За"
 
diff --git a/po/ml.po b/po/ml.po
index 8c1fd36..f1de125 100644
--- a/po/ml.po
+++ b/po/ml.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Malayalam (https://www.transifex.com/mate/teams/13566/ml/)\n"
@@ -479,7 +479,7 @@ msgid "64-bit"
 msgstr "64 ബിറ്റ്"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "മുന്‍ഗണനകള്‍"
 
@@ -530,7 +530,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ഗണനി"
 
@@ -1191,12 +1191,12 @@ msgstr "ചിഹ്നം"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " ല്‍ "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "കണ്‍വേര്‍ഷന്‍ യൂണിറ്റുകള്‍ മാറ്റുക"
 
@@ -1270,7 +1270,7 @@ msgid "Displayed value not an integer"
 msgstr "കാണിച്ച മൂല്ല്യം ഇന്റിജറല്ല"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1278,45 +1278,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ഡിഗ്രി"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "റേഡിയന്‍"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ഗ്രേഡിയന്‍സ്"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ഓട്ടോമാറ്റിക്"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "സ്ഥിരം"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "ശാസ്ത്രീയം"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "സാങ്കേതികം"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d_ദശാംശ സ്ഥാനങ്ങള്‍ കാണിക്കു"
@@ -1360,70 +1360,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ഫിനാന്‍ഷ്യലും ശാസ്ത്രീയ ദശകളുമുള്ള കാല്‍ക്കുലേറ്റര്‍"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_ഗണനി"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_സഹായം"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_അടിസ്ഥാനമായ"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_സങ്കീര്‍ണ്ണമായ"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_ധനകാര്യം"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_പ്രോഗ്രാമിങ്"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_ഉളളടക്കം"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "പകര്‍ത്തുക (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ഒട്ടിയ്ക്കുക"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "വേണ്ട"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "വീണ്ടും"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "മുന്‍ഗണനകള്‍"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "പുറത്ത് കടക്കുക (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_സംബന്ധിച്ച്"
 
diff --git a/po/mn.po b/po/mn.po
index af57d7b..bafce4b 100644
--- a/po/mn.po
+++ b/po/mn.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Mongolian (https://www.transifex.com/mate/teams/13566/mn/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Тохиргоо"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Тооны машин"
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1313,70 +1313,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Санхүүгийн болон шинжлэх ухааны горимуудтай тооны машин."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Тусламж"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Агуулагдхуун"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Хуулах"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Буулгах"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Цуцлах"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Сэргээх"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Тохиргоо"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "/Файл/_Гарах"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Тухай"
 
diff --git a/po/mr.po b/po/mr.po
index 8216802..46cc9cd 100644
--- a/po/mr.po
+++ b/po/mr.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Marathi (https://www.transifex.com/mate/teams/13566/mr/)\n"
@@ -481,7 +481,7 @@ msgid "64-bit"
 msgstr "64-बिट"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "प्राधान्यक्रम"
 
@@ -532,7 +532,7 @@ msgid "MATE Calculator"
 msgstr "मेट गणनयंत्र"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "गणनयंत्र"
 
@@ -1189,12 +1189,12 @@ msgstr "साइन"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "रूपांतरन युनिट्स् बदला"
 
@@ -1268,7 +1268,7 @@ msgid "Displayed value not an integer"
 msgstr "दाखवलेले मूल्य इंटिजर नाही"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1276,45 +1276,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "डिग्रिज्"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "रेडियन्स्"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ग्रेडियन्स्"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "स्वयं"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ठरलेले"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "शास्त्रीय"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "इंजिनिअरिंग"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d डेसिमल ठिकाण दाखवा (_p)"
@@ -1369,70 +1369,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "वित्तीय व शास्त्रीय पध्दतीचे गणनयंत्र."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "गणनयंत्र (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "मोड (_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "मदत(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "मुलभूत (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "प्रगत (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "वित्तिय (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "प्रोग्रामींग (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "विषयसूची (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "प्रत बनवा (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "चिकटवा (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "बदल रद्द करा(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "पुन्हा करा (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "प्राधान्यता (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "बाहेर पडा (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "विषयी (_A)"
 
diff --git a/po/ms.po b/po/ms.po
index 903d983..8dc4887 100644
--- a/po/ms.po
+++ b/po/ms.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: abuyop <[email protected]>, 2018\n"
 "Language-Team: Malay (https://www.transifex.com/mate/teams/13566/ms/)\n"
@@ -481,7 +481,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Keutamaan"
 
@@ -538,7 +538,7 @@ msgid "MATE Calculator"
 msgstr "Kalkulator MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1193,12 +1193,12 @@ msgstr "Tanda"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "dalam"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Tukar unti pertukaran"
 
@@ -1272,7 +1272,7 @@ msgid "Displayed value not an integer"
 msgstr "Nilai dipaparkan bukan interger"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1280,45 +1280,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Darjah"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radian"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradian"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatik"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Tetap"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Saintifik"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Kejuruteraan"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Papar %d tempat _perpuluhan"
@@ -1373,70 +1373,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator dengan mod kewangan dan saintifik."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mod"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Bantuan"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Asas"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Lanjutan"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Kewangan"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Pengaturcaraan"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Kandungan"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Salin"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Tampal"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "B_uat asal"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Buat semu_la"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Keutamaan"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Keluar"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Perih_al"
 
diff --git a/po/my.po b/po/my.po
index 116ab86..27fe09f 100644
--- a/po/my.po
+++ b/po/my.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Burmese (https://www.transifex.com/mate/teams/13566/my/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr "၆၄-ဘစ်"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "လိုလားချက်များ"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ဂဏန်းတွက်စက်"
 
@@ -1141,12 +1141,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "ထည့်ပါ"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr "ကိန်းစစ်မဟုတ်သောတန်ဖိုးကိုဖော်ပြပါ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1228,45 +1228,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ဒီဂရီ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ရေဒီရမ်"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ဂရေဒီရမ်"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "အတိအကျ"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "သိပ္ပံနည်းပညာသုံးပုံစံ"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "အင်ဂျင်နီရာသုံးပုံစံ"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "_P ဒသမနောက်မှ %d  နေရာပြပါ"
@@ -1309,70 +1309,70 @@ msgstr ""
 "ငွေကြေးဆိုင်ရာနှင့်သိပ္ပံနည်းပညာနယ်ပယ်တွင်အသုံးပြုနှိူင်သောဂဏန်းတွက်စက်"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_C ဂဏန်းတွက်စက်"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_M သုံမည့်ပုံစံ"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_H အကူအညီ"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_B အခြေခံသုံး"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_A အဆင့်မြင့်သုံး"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_F ငွေကြေးဆိုင်ရာသုံး"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_P ပရိုဂရမ်မာသုံး"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_C မာတိကာ"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr ""
 
diff --git a/po/nb.po b/po/nb.po
index 9e8b9a5..57f8405 100644
--- a/po/nb.po
+++ b/po/nb.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Allan Nordhøy <[email protected]>, 2018\n"
 "Language-Team: Norwegian Bokmål (https://www.transifex.com/mate/teams/13566/nb/)\n"
@@ -484,7 +484,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Innstillinger"
 
@@ -540,7 +540,7 @@ msgid "MATE Calculator"
 msgstr "MATE-kalkulator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1199,12 +1199,12 @@ msgstr "Tegn"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " i "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Bytt konverteringsenheter"
 
@@ -1278,7 +1278,7 @@ msgid "Displayed value not an integer"
 msgstr "Vist verdi er ikke et heltall"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,Æ,Ø,Å"
 
@@ -1286,45 +1286,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,Æ,Ø,Å"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grader"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianer"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianer"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatisk"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fast"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Vitenskapelig"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniør"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Vis %d desimal_plasser"
@@ -1390,70 +1390,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator med finans- og vitenskapelig modus."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Lommeregner"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modus"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hjelp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Grunnleggende"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avansert"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansiell"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmering"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Innhold"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopier"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Lim inn"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "A_ngre"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Gjenta"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Innstillinger"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Avslutt"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Om"
 
diff --git a/po/nds.po b/po/nds.po
index 409d350..b905eb4 100644
--- a/po/nds.po
+++ b/po/nds.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Benedikt Straub <[email protected]>, 2019\n"
 "Language-Team: Low German (https://www.transifex.com/mate/teams/13566/nds/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Instellens"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1144,12 +1144,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1223,7 +1223,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1231,45 +1231,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Vun alleen"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hölp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Inholls"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Koperen"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Infögen"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Torüggnehmen"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Wedderholen"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Eegenschapten"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Sluten"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Över"
 
diff --git a/po/ne.po b/po/ne.po
index 83b462b..43708dc 100644
--- a/po/ne.po
+++ b/po/ne.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: chautari <[email protected]>, 2018\n"
 "Language-Team: Nepali (https://www.transifex.com/mate/teams/13566/ne/)\n"
@@ -453,7 +453,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "प्राथमिकताहरू"
 
@@ -504,7 +504,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "गणकयन्त्र"
 
@@ -1145,12 +1145,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1224,7 +1224,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1232,45 +1232,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "वैज्ञानिक"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1314,70 +1314,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "आर्थिक र वैज्ञानिक मोडहरू भएको गणकयन्त्र"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "गणकयन्त्र"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "मद्दत"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "आधारभूत"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "उन्नत"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "आर्थिक"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "सामग्री"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "प्रतिलिपि गर्नुहोस्"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "टाँस्नुहोस्"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "पूर्वस्थितिमा फर्काउनुहोस्"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "रिडू गर्नुहोस्"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "प्राथमिकता"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "अन्त्य गर्नुहोस्"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "बारेमा"
 
diff --git a/po/nl.po b/po/nl.po
index 7e9b834..75ea8e1 100644
--- a/po/nl.po
+++ b/po/nl.po
@@ -19,7 +19,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: infirit <[email protected]>, 2018\n"
 "Language-Team: Dutch (https://www.transifex.com/mate/teams/13566/nl/)\n"
@@ -489,7 +489,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Voorkeuren"
 
@@ -546,7 +546,7 @@ msgid "MATE Calculator"
 msgstr "MATE Rekenmachine"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Rekenmachine"
 
@@ -1203,12 +1203,12 @@ msgstr "Teken"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Conversie-eenheid wisselen"
 
@@ -1282,7 +1282,7 @@ msgid "Displayed value not an integer"
 msgstr "Weergegeven waarde is niet een geheel getal"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1290,45 +1290,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graden"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radialen"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gon"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatisch"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Vast"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Wetenschappelijk"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Technisch"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Toon %d decimale _posities"
@@ -1395,70 +1395,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Rekenmachine met financiële en wetenschappelijke standen."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Rekenmachine "
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modus"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hulp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Eenvoudig"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "Ge_avanceerd"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financieel"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmeren"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "In_houd"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiëren"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Plakken"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Ongedaan maken"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Opnieuw uitvoeren"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Voorkeuren"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "A_fsluiten"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Info"
 
diff --git a/po/nn.po b/po/nn.po
index 76866aa..04511cd 100644
--- a/po/nn.po
+++ b/po/nn.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Øystein Steffensen-Alværvik <[email protected]>, 2018\n"
 "Language-Team: Norwegian Nynorsk (https://www.transifex.com/mate/teams/13566/nn/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr "64-bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Innstillingar"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1149,12 +1149,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1230,7 +1230,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1238,45 +1238,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grader"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianar"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianar"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatisk"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Vitskapeleg"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingeniørfag"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1320,70 +1320,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator med finans- og vitskapleg modus."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hjelp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Grunnleggjande"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avansert"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansiell"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmering"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Innhald"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopier"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Lim inn"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Angre"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Gje_r om"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Innstillingar"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Avslutt"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Om"
 
diff --git a/po/nso.po b/po/nso.po
index 93606f7..6397e65 100644
--- a/po/nso.po
+++ b/po/nso.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Northern Sotho (https://www.transifex.com/mate/teams/13566/nso/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Thušo"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Dikagare"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiša"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Kgomaretša"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Dirolla"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Dira gape"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Tše ratwago"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Tlogela"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Ka ga"
 
diff --git a/po/oc.po b/po/oc.po
index 4d4307f..5ee5f26 100644
--- a/po/oc.po
+++ b/po/oc.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Cédric Valmary <[email protected]>, 2018\n"
 "Language-Team: Occitan (post 1500) (https://www.transifex.com/mate/teams/13566/oc/)\n"
@@ -484,7 +484,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferéncias"
 
@@ -535,7 +535,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadoira"
 
@@ -1176,12 +1176,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " en "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Invèrsa las unitats de conversion"
 
@@ -1255,7 +1255,7 @@ msgid "Displayed value not an integer"
 msgstr "La valor afichada es pas un entièr"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1263,45 +1263,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grases"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radians"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Grads"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatic"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixe"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Scientific"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingenhariá"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Afichar %d de_cimalas"
@@ -1345,70 +1345,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadoira amb de mòdes financièrs e scientifics."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "Calc_uladoira"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Aju_da"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Basic"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avançat"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financièr"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Ensenhador"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Pegar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Anullar"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Tornar far"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferéncias"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Quitar"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "A _prepaus"
 
diff --git a/po/or.po b/po/or.po
index 8d16bec..d6f63ec 100644
--- a/po/or.po
+++ b/po/or.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Oriya (https://www.transifex.com/mate/teams/13566/or/)\n"
@@ -475,7 +475,7 @@ msgid "64-bit"
 msgstr "64-ବିଟ"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ପସନ୍ଦ"
 
@@ -526,7 +526,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "କାଲକୁଲେଟର"
 
@@ -1181,12 +1181,12 @@ msgstr "ହସ୍ତାକ୍ଷର କରନ୍ତୁ"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " ଭିତରେ "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1260,7 +1260,7 @@ msgid "Displayed value not an integer"
 msgstr "ପ୍ରଦର୍ଶିତ ମୂଲ୍ଯଟି ଗୋଟିଏ ଗଣନ ସଂଖ୍ୟା ନୁହଁ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1268,45 +1268,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ଡିଗ୍ରି"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ରାଡିଆନ"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ଗ୍ରାଡିଆନ"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ସ୍ବୟଂଚାଳିତ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ସ୍ଥିର "
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "ବୈଜ୍ଞାନିକ"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ଯାନ୍ତ୍ରିକ ବିଦ୍ୟା"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d ଦଶମିକ ସ୍ଥାନଗୁଡିକୁ ଦର୍ଶାନ୍ତୁ (_p)"
@@ -1348,70 +1348,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ଆର୍ଥିକ ଓ ବୈଜ୍ଞାନିକ ଧାରା ସହିତ କାଲ୍କୁଲେଟର."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "କାଲ୍କୁଲେଟର (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "ଧାରା (_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ସହାୟତା (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ମୌଳିକ (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "ଉନ୍ନତ (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "ଆର୍ଥିକ (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "କାର୍ଯ୍ୟକ୍ରମ (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "ସୂଚୀପତ୍ର (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "ନକଲ କରନ୍ତୁ (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ଲଗାନ୍ତୁ (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "ପ୍ରତିକାର କରନ୍ତୁ (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ପୁନର୍ବାର କରନ୍ତୁ (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "ପସନ୍ଦ (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "ବିଦାୟ ନିଅନ୍ତୁ (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "ବିବରଣୀ (_A)"
 
diff --git a/po/pa.po b/po/pa.po
index 157ba82..d4f67c6 100644
--- a/po/pa.po
+++ b/po/pa.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Panjabi (Punjabi) (https://www.transifex.com/mate/teams/13566/pa/)\n"
@@ -476,7 +476,7 @@ msgid "64-bit"
 msgstr "64-ਬਿੱਟ"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ਮੇਰੀ ਪਸੰਦ"
 
@@ -527,7 +527,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ਕੈਲਕੂਲੇਟਰ"
 
@@ -1184,12 +1184,12 @@ msgstr "ਸਾਈਨ"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " ਵਿੱਚ "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "ਬਦਲਣ ਯੂਨਿਟਾਂ ਪਲਟਾਓ"
 
@@ -1263,7 +1263,7 @@ msgid "Displayed value not an integer"
 msgstr "ਵੇਖਾਇਆ ਮੁੱਲ ਪੂਰਨ ਅੰਕ ਨਹੀਂ ਹੈ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1271,45 +1271,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "ਡਿਗਰੀ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ਰੇਡੀਅਨ"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "ਗਰੇਡੀਅਨ"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ਆਟੋਮੈਟਿਕ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ਸਥਿਰ"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "ਵਿਗਿਆਨਿਕ"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ਇੰਜਿਨਅਰਿੰਗ"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d ਦਸ਼ਮਲਵ ਅੰਕਾਂ ਤੱਕ ਵੇਖੋ(_p)"
@@ -1355,70 +1355,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ਆਰਥਿਕ ਅਤੇ ਵਿਗਿਆਨਿਕ ਢੰਗਾਂ ਵਾਲਾ ਕੈਲਕੂਲੇਟਰ ਹੈ।"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ਕੈਲਕੂਲੇਟਰ(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "ਮੋਡ(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ਮੱਦਦ(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ਮੁੱਢਲਾ(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "ਤਕਨੀਕੀ(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "ਵਿੱਤੀ(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "ਪਰੋਗਾਰਮਿੰਗ(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "ਸਮੱਗਰੀ(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "ਕਾਪੀ ਕਰੋ(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "ਚੇਪੋ(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "ਵਾਪਿਸ(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ਪਰਤਾਉ(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "ਮੇਰੀ ਪਸੰਦ(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "ਬਾਹਰ(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "ਇਸ ਬਾਰੇ(_A)"
 
diff --git a/po/pl.po b/po/pl.po
index fa3c68a..0694f5e 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -18,7 +18,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Przemek P <[email protected]>, 2018\n"
 "Language-Team: Polish (https://www.transifex.com/mate/teams/13566/pl/)\n"
@@ -485,7 +485,7 @@ msgid "64-bit"
 msgstr "64 bity"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferencje"
 
@@ -540,7 +540,7 @@ msgid "MATE Calculator"
 msgstr "Kalkulator MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1201,12 +1201,12 @@ msgstr "Signum"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " na "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Przełącza jednostki konwersji"
 
@@ -1280,7 +1280,7 @@ msgid "Displayed value not an integer"
 msgstr "Wyświetlana wartość nie jest całkowita"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1288,45 +1288,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stopnie"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiany"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiany"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatyczny"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Stały"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Naukowy"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inżynierski"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Wyświetlanie %d _miejsc po przecinku"
@@ -1382,70 +1382,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator z trybem finansowym i naukowym."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Tryb"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "P_omoc"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Podstawowy"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Zaawansowany"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansowy"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "P_rogramowanie"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Spis treści"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "S_kopiuj"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Wk_lej"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Cofnij"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ponów"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "P_referencje"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Zakończ"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_O programie"
 
diff --git a/po/pms.po b/po/pms.po
index d0b4074..ab73938 100644
--- a/po/pms.po
+++ b/po/pms.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Randy Ichinose <[email protected]>, 2018\n"
 "Language-Team: Piemontese (https://www.transifex.com/mate/teams/13566/pms/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferense"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calcolatris"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Agiut"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copia"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Seurte"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Al rësgard"
 
diff --git a/po/ps.po b/po/ps.po
index b4c48d7..d95b39f 100644
--- a/po/ps.po
+++ b/po/ps.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Pushto (https://www.transifex.com/mate/teams/13566/ps/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "غوراوي"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "مرسته_"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "منځپانګې_"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "لمېسل_"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "سرېښل_"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "ناکړ_"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "بياکړ_"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "غوراوي_"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "بندول_"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "په اړه_"
 
diff --git a/po/pt.po b/po/pt.po
index 7396d0d..a9414a5 100644
--- a/po/pt.po
+++ b/po/pt.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Rui <[email protected]>, 2018\n"
 "Language-Team: Portuguese (https://www.transifex.com/mate/teams/13566/pt/)\n"
@@ -488,7 +488,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferências"
 
@@ -544,7 +544,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1201,12 +1201,12 @@ msgstr "Sinal"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " em "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Alterar as unidades de conversão"
 
@@ -1280,7 +1280,7 @@ msgid "Displayed value not an integer"
 msgstr "O valor apresentado não é um inteiro"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1288,45 +1288,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graus"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianos"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianos"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automático"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixo"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científico"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Engenharia"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostrar %d _casas decimais"
@@ -1381,70 +1381,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora com modos financeiro e científico."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modo"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "A_juda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Básico"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avançado"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financeiro"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programação"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Conteúdo"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Co_lar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "An_ular"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refazer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferências"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Sair"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Sobre"
 
diff --git a/po/pt_BR.po b/po/pt_BR.po
index b595ae0..6aa5556 100644
--- a/po/pt_BR.po
+++ b/po/pt_BR.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Samuel Henrique <[email protected]>, 2018\n"
 "Language-Team: Portuguese (Brazil) (https://www.transifex.com/mate/teams/13566/pt_BR/)\n"
@@ -490,7 +490,7 @@ msgid "64-bit"
 msgstr "64-bits"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferências"
 
@@ -546,7 +546,7 @@ msgid "MATE Calculator"
 msgstr "Calculadora do MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculadora"
 
@@ -1203,12 +1203,12 @@ msgstr "Sinal"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " em "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Mudar unidade de conversão"
 
@@ -1282,7 +1282,7 @@ msgid "Displayed value not an integer"
 msgstr "Valor exibido não é um inteiro"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1290,45 +1290,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Graus"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianos"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradianos"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automático"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixo"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Científica"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Engenharia"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Mostrar %d _casas decimais"
@@ -1395,70 +1395,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculadora com modos financeiro e científico."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculadora"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modo"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ajuda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Básica"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avançada"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financeira"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programável"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "S_umário"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiar"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "C_olar"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Desfa_zer"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refazer"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferências"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Sair"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Sobre"
 
diff --git a/po/ro.po b/po/ro.po
index 4301b22..3cf5fcd 100644
--- a/po/ro.po
+++ b/po/ro.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Daniel <[email protected]>, 2018\n"
 "Language-Team: Romanian (https://www.transifex.com/mate/teams/13566/ro/)\n"
@@ -487,7 +487,7 @@ msgid "64-bit"
 msgstr "64 biți"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferințe"
 
@@ -544,7 +544,7 @@ msgid "MATE Calculator"
 msgstr "Calculator MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Calculator"
 
@@ -1203,12 +1203,12 @@ msgstr "Semn"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " în "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Schimbare unități de conversie"
 
@@ -1282,7 +1282,7 @@ msgid "Displayed value not an integer"
 msgstr "Valoarea afișată nu este un întreg"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1290,45 +1290,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grade"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiani"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiani"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automat"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fix"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Științific"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingineresc"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Arată %d cifre du_pă virgulă"
@@ -1384,70 +1384,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Calculator cu mod financiar și științific."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Calculator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mod"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ajutor"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Standard"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avansat"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financiar"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programare"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Conținut"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copiază"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Lipește"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Anulea_ză"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Refă"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferințe"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Închide"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Despre"
 
diff --git a/po/ru.po b/po/ru.po
index 85e4e5b..ed95ee0 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Alex Putz, 2018\n"
 "Language-Team: Russian (https://www.transifex.com/mate/teams/13566/ru/)\n"
@@ -487,7 +487,7 @@ msgid "64-bit"
 msgstr "64 бита"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Параметры"
 
@@ -541,7 +541,7 @@ msgid "MATE Calculator"
 msgstr "Калькулятор MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Калькулятор"
 
@@ -1202,12 +1202,12 @@ msgstr "Знак"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " в "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Поменять местами конвертируемые единицы"
 
@@ -1281,7 +1281,7 @@ msgid "Displayed value not an integer"
 msgstr "Значение не является целым числом"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1289,45 +1289,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Градусы"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радианы"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Грады"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Автоматический"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Фиксированный"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Научный"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Инженерный"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Показывать %d десятичных _разрядов"
@@ -1414,70 +1414,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Калькулятор с финансовым и научным режимами."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Калькулятор"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Помощь"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Простой"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Расширенный"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Финансовый"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "Пр_ограммирование"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Содержание"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Копировать"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Вст_авить"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Отменить"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Ве_рнуть"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Н_астройка"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Выход"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Об апплете"
 
diff --git a/po/rw.po b/po/rw.po
index 70ebb75..907fe8e 100644
--- a/po/rw.po
+++ b/po/rw.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Kinyarwanda (https://www.transifex.com/mate/teams/13566/rw/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Ibyahisemo"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Cya gihanga"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr ""
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr ""
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr ""
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr ""
 
diff --git a/po/si.po b/po/si.po
index 42a6b14..cb3a301 100644
--- a/po/si.po
+++ b/po/si.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Sinhala (https://www.transifex.com/mate/teams/13566/si/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "අභිප්‍රේත"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ගණකය"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "විද්‍යාත්මක"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "මුල්‍ය සහ විද්‍යාත්මක ආකාර සමඟ ගණකය"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "ගණනය (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "උදව් (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "සාමාන්‍ය (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "උසස් (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "මූල්‍යමය (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "ක්‍රමලේඛණය (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "අන්තර්ගත (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "පිටපත් කරන්න (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "අලවන්න (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "අහෝසි (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "යළි කරන්න (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "අභිප්‍රේත (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "ඉවත් වන්න (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "සම්බන්ධව (_A)"
 
diff --git a/po/sk.po b/po/sk.po
index 7186068..767f34f 100644
--- a/po/sk.po
+++ b/po/sk.po
@@ -18,7 +18,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Erik Bročko <[email protected]>, 2018\n"
 "Language-Team: Slovak (https://www.transifex.com/mate/teams/13566/sk/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64 bitov"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Nastavenia"
 
@@ -539,7 +539,7 @@ msgid "MATE Calculator"
 msgstr "MATE kalkulačka"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulačka"
 
@@ -1200,12 +1200,12 @@ msgstr "Znamienko"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " na "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Vymeniť jednotky prevodu"
 
@@ -1279,7 +1279,7 @@ msgid "Displayed value not an integer"
 msgstr "Zobrazená hodnota nie je celé číslo"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1287,45 +1287,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stupne"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiány"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiány"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automaticky"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fixný"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Vedecký"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inžiniersky"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Zobraziť %d _desatinných miest"
@@ -1384,70 +1384,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulačka s finančným a vedeckým režimom."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulačka"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Režim"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Pomocník"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Základný"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Rozšírený"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finančný"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programátorský"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Ob_sah"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopírovať"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Vložiť"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Vrátiť"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Znova vykonať"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Nastavenia"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Ukončiť"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "O progr_ame"
 
diff --git a/po/sl.po b/po/sl.po
index f9ff3a0..f54c5f9 100644
--- a/po/sl.po
+++ b/po/sl.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Helena S <[email protected]>, 2018\n"
 "Language-Team: Slovenian (https://www.transifex.com/mate/teams/13566/sl/)\n"
@@ -482,7 +482,7 @@ msgid "64-bit"
 msgstr "64 bitni"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Možnosti"
 
@@ -533,7 +533,7 @@ msgid "MATE Calculator"
 msgstr "Računalo MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Računalo"
 
@@ -1194,12 +1194,12 @@ msgstr "Predznak števila x"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " v "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Preklopi enote pretvarjanja"
 
@@ -1273,7 +1273,7 @@ msgid "Displayed value not an integer"
 msgstr "Prikazana vrednost ni celoštevilska vrednost"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1281,45 +1281,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stopinje"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radiani"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradiani"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Samodejno"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Določeno"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Znanstveni"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inženirstvo"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Pokaži %d decimalnih _mest"
@@ -1373,70 +1373,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Računalo z različnimi načini delovanja."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Način"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Pomoč"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Osnovni"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Napredni"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finančni"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programiranje"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Vsebina"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiraj"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Prilepi"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Razveljavi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Uveljavi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Možnosti"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Končaj"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_O programu"
 
diff --git a/po/sq.po b/po/sq.po
index 768e816..ac5e0e0 100644
--- a/po/sq.po
+++ b/po/sq.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Indrit Bashkimi <[email protected]>, 2018\n"
 "Language-Team: Albanian (https://www.transifex.com/mate/teams/13566/sq/)\n"
@@ -454,7 +454,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Parapëlqimet"
 
@@ -505,7 +505,7 @@ msgid "MATE Calculator"
 msgstr "MATE Llogaritës"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Makinë llogaritëse"
 
@@ -1146,12 +1146,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1225,7 +1225,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1233,45 +1233,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Gradë"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Shkencor"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1316,70 +1316,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Makinë llogaritëse me modalitete finance dhe shkencore."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator (llogaritës)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Modaliteti"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ndihmë"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Bazë"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Përparuar"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Financor"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Përmbajtja"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopjo"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Ngjite"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Anullo"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Përsërit"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferenca"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Dalja"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Rreth"
 
diff --git a/po/sr.po b/po/sr.po
index a531fb4..aa28870 100644
--- a/po/sr.po
+++ b/po/sr.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Мирослав Николић <[email protected]>, 2018\n"
 "Language-Team: Serbian (https://www.transifex.com/mate/teams/13566/sr/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "64 бита"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Поставке"
 
@@ -535,7 +535,7 @@ msgid "MATE Calculator"
 msgstr "Мејтов дигитрон"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Дигитрон"
 
@@ -1194,12 +1194,12 @@ msgstr "Знак"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " у "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Промените јединице претварања"
 
@@ -1273,7 +1273,7 @@ msgid "Displayed value not an integer"
 msgstr "Приказана вредност није цео број"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1281,45 +1281,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Степени"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радијани"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Градијани"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Аутоматски"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Фиксни"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Научни"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Инжењерски"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "_Прикажи %d децимална места"
@@ -1375,70 +1375,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Дигитрон са финансијским и научним начином рада."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Дигитрон"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Режим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "По_моћ"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Основни"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Напредни"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Финансијски"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Програмерски"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Садржаји"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Умножи"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "У_баци"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Опо_зови"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Понови"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Поставке"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Изађи"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_О програму"
 
diff --git a/po/[email protected] b/po/[email protected]
index d8a775b..d090e15 100644
--- a/po/[email protected]
+++ b/po/[email protected]
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Serbian (Latin) (https://www.transifex.com/mate/teams/13566/sr%40latin/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "64 bita"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Postavke"
 
@@ -529,7 +529,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulator"
 
@@ -1188,12 +1188,12 @@ msgstr "Znak"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " u "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Promenite jedinice pretvaranja"
 
@@ -1267,7 +1267,7 @@ msgid "Displayed value not an integer"
 msgstr "Prikazana vrednost nije ceo broj"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1275,45 +1275,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Stepeni"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radijani"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gradijani"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatski"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fiksni"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Naučni"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Inženjerski"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "_Prikaži %d decimalna mesta"
@@ -1358,70 +1358,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkulator sa finansijskim i naučnim načinom rada."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Mod"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Pomoć"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Osnovni"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "Na_predni"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansijski"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "P_rogramerski"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Sad_ržaj"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Umnoži"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "U_baci"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Opo_zovi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ponovi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "Po_stavke"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Izađi"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_O programu"
 
diff --git a/po/sv.po b/po/sv.po
index eff64ed..28111c4 100644
--- a/po/sv.po
+++ b/po/sv.po
@@ -19,7 +19,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Philip Andersen <[email protected]>, 2018\n"
 "Language-Team: Swedish (https://www.transifex.com/mate/teams/13566/sv/)\n"
@@ -487,7 +487,7 @@ msgid "64-bit"
 msgstr "64-bitars"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Inställningar"
 
@@ -544,7 +544,7 @@ msgid "MATE Calculator"
 msgstr "MATE Kalkylatorn"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkylator"
 
@@ -1201,12 +1201,12 @@ msgstr "Tecken"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " i "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Byt konverteringsenheter"
 
@@ -1280,7 +1280,7 @@ msgid "Displayed value not an integer"
 msgstr "Visat värde är inte ett heltal"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1288,45 +1288,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Grader"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radianer"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Nygrader"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Automatiskt"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Fast"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Vetenskaplig"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Ingenjör"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Visa %d decimal_platser"
@@ -1380,70 +1380,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Kalkylator med finansiella och vetenskapliga lägen."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Miniräknare"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Läge"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Hjälp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Grundläggande"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Avancerad"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Finansiell"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programmering"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Innehåll"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopiera"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Klistra _in"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Ångra"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Gör om"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Inställningar"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Avsluta"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Om"
 
diff --git a/po/ta.po b/po/ta.po
index 240505d..cde2b8a 100644
--- a/po/ta.po
+++ b/po/ta.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Kamala Kannan, 2018\n"
 "Language-Team: Tamil (https://www.transifex.com/mate/teams/13566/ta/)\n"
@@ -477,7 +477,7 @@ msgid "64-bit"
 msgstr "64 பிட்"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "விருப்ப தேர்வுகள் "
 
@@ -528,7 +528,7 @@ msgid "MATE Calculator"
 msgstr "MATE கணிப்பான்"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "கணிப்பான்"
 
@@ -1185,12 +1185,12 @@ msgstr "கையொப்பம்"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " உள்ளே "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "மாற்றும் அலகை மாற்று"
 
@@ -1264,7 +1264,7 @@ msgid "Displayed value not an integer"
 msgstr "காட்டப்பட்ட மதிப்பு முழு எண் இல்லை."
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1272,45 +1272,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "பாகைகள்"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "ரேடியன்கள்"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "கிரேடியன்கள்"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "தானியங்கி"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "நிலையான"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "அறிவியல் "
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "பொறியியல்"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "_p %d தசம இடங்களை காட்டு"
@@ -1366,70 +1366,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "கணிப்பானுடன் நிதி தொடர்பான மற்றும் அறிவியல் பாங்குகள்."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "கணிப்பி (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_M மோட்"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_உதவி"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "அடிப்படை (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "மேம்பட்ட  (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "நிதிநிலை (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "நிரலாக்கம் (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_C உள்ளடக்கங்கள்"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "நகல் (_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_ஒட்டு"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_கவில்"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_மீண்டும்"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "விருப்ப தேர்வுகள் "
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_வ _வெளிச்செல்"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "பற்றி "
 
diff --git a/po/te.po b/po/te.po
index 7d742f3..25d3eae 100644
--- a/po/te.po
+++ b/po/te.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Telugu (https://www.transifex.com/mate/teams/13566/te/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "64-బిట్"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "అభిరుచులు"
 
@@ -529,7 +529,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "గణన పరికరం"
 
@@ -1186,12 +1186,12 @@ msgstr "చిహ్నం"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " in "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "పరివర్తక ప్రమాణాలను మార్చు"
 
@@ -1265,7 +1265,7 @@ msgid "Displayed value not an integer"
 msgstr "ప్రదర్శించబడిన విలువ పూర్ణాంకం కాదు"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1273,45 +1273,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "డిగ్రీలు"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "రేడియన్లు"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "గ్రేడియన్లు"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "స్వయంచాలకం"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "స్థిర"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "శాస్త్రీయం"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ఇంజనీరింగు"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d దశాంశ స్థానాలను చూపించు (_p)"
@@ -1353,70 +1353,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ఆర్థిక మరియు శాస్త్రీయ విధములున్న గణన పరికరం."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "గణనపరికరం (_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "సహాయం (_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "ప్రాథమిక (_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "ఆధునిక (_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "ఆర్థికగణని (_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "ప్రోగ్రామింగ్ (_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "సారములు (_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "నకలుతీయు(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "అతికించు (_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "చేసింది రద్దు (_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "మళ్ళీచేయి (_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "అభిరుచులు (_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "నిష్క్రమించు (_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "గురించి (_A)"
 
diff --git a/po/th.po b/po/th.po
index d90bf9c..5d4ec67 100644
--- a/po/th.po
+++ b/po/th.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Akom <[email protected]>, 2018\n"
 "Language-Team: Thai (https://www.transifex.com/mate/teams/13566/th/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "64 บิต"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "การตั้งค่า"
 
@@ -529,7 +529,7 @@ msgid "MATE Calculator"
 msgstr "เครื่องคิดเลข MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "เครื่องคิดเลข"
 
@@ -1184,12 +1184,12 @@ msgstr "เครื่องหมาย"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " เป็น "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "สลับหน่วยการแปลง"
 
@@ -1263,7 +1263,7 @@ msgid "Displayed value not an integer"
 msgstr "ค่าที่แสดงอยู่ไม่ใช่จำนวนเต็ม"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1271,45 +1271,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "องศา"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "เรเดียน"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "เกรเดียน"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "อัตโนมัติ"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "ทศนิยมตายตัว"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "วิทยาศาสตร์"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "วิศวกรรม"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "แสดงจุดทศนิยม %d _ตำแหน่ง"
@@ -1363,70 +1363,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "เครื่องคิดเลข พร้อมด้วยโหมดการเงินและวิทยาศาสตร์"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "เ_ครื่องคิดเลข"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "โห_มด"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_วิธีใช้"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_พื้นฐาน"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "พิ_เศษ"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "การเ_งิน"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "การเขียนโ_ปรแกรม"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "เ_นื้อหา"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_คัดลอก"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_แปะ"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "เรี_ยกคืน"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_ทำซ้ำ"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_การกำหนดค่า"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_ออก"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "เ_กี่ยวกับ"
 
diff --git a/po/tk.po b/po/tk.po
index 3d8ea75..cf20bf7 100644
--- a/po/tk.po
+++ b/po/tk.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Turkmen (https://www.transifex.com/mate/teams/13566/tk/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Seçenekler"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Çot"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Maliýe we Ilmi modly Çot"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Help"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Mazmunlar"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Nusgala"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Ýabşyr"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Izine Al"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Ýene Et"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Çyk"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Barada"
 
diff --git a/po/tr.po b/po/tr.po
index f707aa5..18ae629 100644
--- a/po/tr.po
+++ b/po/tr.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: mauron, 2018\n"
 "Language-Team: Turkish (https://www.transifex.com/mate/teams/13566/tr/)\n"
@@ -486,7 +486,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Tercihler"
 
@@ -543,7 +543,7 @@ msgid "MATE Calculator"
 msgstr "MATE Hesap Makinesi"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Hesap Makinesi"
 
@@ -1200,12 +1200,12 @@ msgstr "İşaret"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "şu birimde:"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Dönüştürme birimlerini yer değiştir"
 
@@ -1279,7 +1279,7 @@ msgid "Displayed value not an integer"
 msgstr "Gösterilen değer tam sayı değil"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1287,45 +1287,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Derece"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Radyan"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Grad"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Otomatik"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Sabit"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Bilimsel"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Mühendislik"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "%d ondalık _hane göster"
@@ -1389,70 +1389,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Ekonomi ve bilim kipli hesap makinesi."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Hesap Makinesi"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "K_ip"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Yardım"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Temel"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Gelişmiş"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Ekonomi"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Programlama"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "İçi_ndekiler"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopyala"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Y_apıştır"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Geri"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Tekrarla"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Tercihler"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Çık"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Hakkında"
 
diff --git a/po/tt.po b/po/tt.po
index 9f28e8e..6992d14 100644
--- a/po/tt.po
+++ b/po/tt.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Tatar (https://www.transifex.com/mate/teams/13566/tt/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1141,12 +1141,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1228,45 +1228,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1308,70 +1308,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Yärdäm"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Eçtälek"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "İs_kä al:"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Ös_tä"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Kire _al"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Kire _quy"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Çığış"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Turında"
 
diff --git a/po/ug.po b/po/ug.po
index 8a9c376..88e67b4 100644
--- a/po/ug.po
+++ b/po/ug.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Uighur (https://www.transifex.com/mate/teams/13566/ug/)\n"
@@ -453,7 +453,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "مايىللىق"
 
@@ -504,7 +504,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "ھېسابلىغۇچ"
 
@@ -1160,12 +1160,12 @@ msgstr "ئىمزا"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " دىيۇيم "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "ئايلاندۇرۇش بىرلىكىنى ئالماشتۇرۇش"
 
@@ -1239,7 +1239,7 @@ msgid "Displayed value not an integer"
 msgstr "پۈتۈن ساندىن باشقىنى كۆرسىتىدۇ"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0،1،2،3،4،5،6،7،8،9،A،B،C،D،E،F"
 
@@ -1247,45 +1247,45 @@ msgstr "0،1،2،3،4،5،6،7،8،9،A،B،C،D،E،F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "گرادۇس"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "رادىئان"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "ئاپتوماتىك"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "مۇقىم"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "پەن-تېخنىكا"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "ئىنژېنېرلىق ئىلمى"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "چېكىتنىڭ كەينىدىن %d خانە كۆرسىتىش(_P)"
@@ -1336,70 +1336,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "ئىقتىسادىي ۋە ئىلمىي ھېسابلىغۇچ"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "ياردەم(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "مەزمۇن(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "كۆچۈر(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "چاپلا(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "يېنىۋال(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "تەكرارلا(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "مايىللىق(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "ئاخىرلاشتۇرۇش(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "ھەققىدە(_A)"
 
diff --git a/po/uk.po b/po/uk.po
index 2a861ed..05774fc 100644
--- a/po/uk.po
+++ b/po/uk.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Микола Ткач <[email protected]>, 2018\n"
 "Language-Team: Ukrainian (https://www.transifex.com/mate/teams/13566/uk/)\n"
@@ -483,7 +483,7 @@ msgid "64-bit"
 msgstr "64-ох бітовий"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Налаштування"
 
@@ -537,7 +537,7 @@ msgid "MATE Calculator"
 msgstr "Рахівник MATE"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Рахівник"
 
@@ -1198,12 +1198,12 @@ msgstr "Знак"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " в"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Змінити одиницю перетворення"
 
@@ -1277,7 +1277,7 @@ msgid "Displayed value not an integer"
 msgstr "Показане значення не є цілим числом"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1285,45 +1285,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Градуси"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "Радіани"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Гради"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Самочинно"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Виправлено"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Науковий"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Інженерний"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Показати _місця десяткового %d"
@@ -1382,70 +1382,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Рахівник з фінансовими і науковими функціями."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Рахівник"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "Р_ежим"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Допомога"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Простий"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Розширений"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Фінансовий"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Проґрамування"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Вміст"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Копіювати"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "Вст_авити"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "Пов_ернути"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Повт_орити"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Налаштування"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Вийти"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Про проґраму"
 
diff --git a/po/ur.po b/po/ur.po
index 5c172ef..21437ae 100644
--- a/po/ur.po
+++ b/po/ur.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: mauron, 2018\n"
 "Language-Team: Urdu (https://www.transifex.com/mate/teams/13566/ur/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "ترجیحات"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "خودکار"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1316,70 +1316,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_ہدایات"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_ہدایات کے موضوعات"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_کاپی کریں"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_منسوخ کریں"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "ا_عادہ کریں"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_ترجیحات"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_برخاست کریں"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_بابت"
 
diff --git a/po/uz.po b/po/uz.po
index 82ee331..d7e0453 100644
--- a/po/uz.po
+++ b/po/uz.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: muzaffar habibullayev <[email protected]>, 2018\n"
 "Language-Team: Uzbek (https://www.transifex.com/mate/teams/13566/uz/)\n"
@@ -452,7 +452,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Parametrlar"
 
@@ -503,7 +503,7 @@ msgid "MATE Calculator"
 msgstr "MATE Kalkulyator"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Kalkulyator"
 
@@ -1142,12 +1142,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1221,7 +1221,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1229,45 +1229,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Avtomatik"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Qat'iy"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Ilmiy"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Muhandislik"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1309,70 +1309,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "_Kalkulyator"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "_Rejim"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Yordam"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Sodda"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Murakkab"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Moliyaviy"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Dasturlash"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Tarkibi"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Nusxa olish"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Bekor qilish"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Qaytarish"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Xususiyatlar"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Chiqish"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Haqida"
 
diff --git a/po/vi.po b/po/vi.po
index e232854..000e211 100644
--- a/po/vi.po
+++ b/po/vi.po
@@ -13,7 +13,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Horazone Detex <[email protected]>, 2018\n"
 "Language-Team: Vietnamese (https://www.transifex.com/mate/teams/13566/vi/)\n"
@@ -478,7 +478,7 @@ msgid "64-bit"
 msgstr "64-bit"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Tùy chỉnh"
 
@@ -529,7 +529,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Bàn tính"
 
@@ -1180,12 +1180,12 @@ msgstr "Dấu"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " theo "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "Chuyển đổi đơn vị"
 
@@ -1259,7 +1259,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1267,45 +1267,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "Độ"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "_Rađian"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "Gr_ađian"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "Tự động"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "Cố định"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Khoa học"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "Kỹ sư"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "Hiện %d _số thập phân"
@@ -1347,70 +1347,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Máy tính với chế độ tài chính và khoa học."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "Bàn _tính"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "Trợ _giúp"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "Cơ _bản"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "_Cấp cao"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "_Tài chính"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "_Lập trình"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Mụ_c lục"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Chép"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Dán"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Hủy bước"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "Bước _lại"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Tùy thích"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "T_hoát"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Giới thiệu"
 
diff --git a/po/wa.po b/po/wa.po
index 71586f2..3983730 100644
--- a/po/wa.po
+++ b/po/wa.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Walloon (https://www.transifex.com/mate/teams/13566/wa/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Preferinces"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Aidance"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "Å d_vins"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Copyî"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "C_laper"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Disfé"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Rifé"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Preferinces"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "Moussî _foû"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "Å_d fwait"
 
diff --git a/po/xh.po b/po/xh.po
index 894f777..dff2a9f 100644
--- a/po/xh.po
+++ b/po/xh.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Xhosa (https://www.transifex.com/mate/teams/13566/xh/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Uluhlu lwezinto ezikhethwayo"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "Ikhaltyuleyitha"
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "Ezenzululwazi"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "Ikhaltyuleyitha enentlobo zemali na manani."
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "I_khaltyuleyitha"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Nceda"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "_Esisiseko"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "E_hambele phambili"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "E_zezimali"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Okuqulethweyo"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopa"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Ncamathelisa"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Buyisela okwenziweyo"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Yenze kwakhona"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Ezikhethwayo"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Phuma"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Malunga"
 
diff --git a/po/yi.po b/po/yi.po
index ebc203e..a4cdca4 100644
--- a/po/yi.po
+++ b/po/yi.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Yiddish (https://www.transifex.com/mate/teams/13566/yi/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1310,70 +1310,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "געהילף"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "אינהאַלט"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "קאָפּיר"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "קלעפּ"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "פֿאַרקער"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "איבער־פֿאַרקער"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr ""
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "הער אױף"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr ""
 
diff --git a/po/yo.po b/po/yo.po
index 7d0b44d..0067a51 100644
--- a/po/yo.po
+++ b/po/yo.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Yoruba (https://www.transifex.com/mate/teams/13566/yo/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "Àwọn ìkúndùn"
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1141,12 +1141,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1220,7 +1220,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1228,45 +1228,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1308,70 +1308,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Ìrànwọ́"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Àwọn Àkóónú"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr ""
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr ""
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Padà Sípò"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr ""
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Àwọn ìkúndùǹ"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr ""
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Nípa"
 
diff --git a/po/zh_CN.po b/po/zh_CN.po
index 39591ba..2e2e8a7 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -16,7 +16,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Mingcong Bai <[email protected]>, 2018\n"
 "Language-Team: Chinese (China) (https://www.transifex.com/mate/teams/13566/zh_CN/)\n"
@@ -457,7 +457,7 @@ msgid "64-bit"
 msgstr "64 位"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "首选项"
 
@@ -511,7 +511,7 @@ msgid "MATE Calculator"
 msgstr "MATE 计算器"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "计算器"
 
@@ -1166,12 +1166,12 @@ msgstr "符号"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr " 换算为 "
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "转换单位"
 
@@ -1245,7 +1245,7 @@ msgid "Displayed value not an integer"
 msgstr "显示的值不是整数"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1253,45 +1253,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "角度(_G)"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "弧度"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "百分度"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "自动"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "定点数"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "科学"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "工程"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "显示 %d 个十进制位(_P)"
@@ -1349,70 +1349,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "带有财务和科学模式的计算器。"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "计算器（_C）"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "模式(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "帮助（_H）"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "基本(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "高级(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "财务(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "编程(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "目录(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "复制(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "粘贴(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "撤消(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "重做(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "属性(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "退出(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "关于(_A)"
 
diff --git a/po/zh_HK.po b/po/zh_HK.po
index 6e15707..33c5b06 100644
--- a/po/zh_HK.po
+++ b/po/zh_HK.po
@@ -12,7 +12,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Chinese (Hong Kong) (https://www.transifex.com/mate/teams/13566/zh_HK/)\n"
@@ -454,7 +454,7 @@ msgid "64-bit"
 msgstr "64 位元"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "偏好設定"
 
@@ -505,7 +505,7 @@ msgid "MATE Calculator"
 msgstr "MATE 計數機"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "計數機"
 
@@ -1159,12 +1159,12 @@ msgstr "符號函數"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "轉為"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "切換轉換單位"
 
@@ -1238,7 +1238,7 @@ msgid "Displayed value not an integer"
 msgstr "顯示的數值不是整數值"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1246,45 +1246,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "度"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "弧度"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "梯度"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "自動"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "固定的"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "科學計算"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "工程"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "顯示小數點後 %d 位數(_P)"
@@ -1340,70 +1340,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "附有財務及科學計算模式的計數機。"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "計數機(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "模式(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "求助(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "基本模式(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "進階模式(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "財務計算模式(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "軟件開發(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "內容(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "複製(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "貼上(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "復原(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "取消復原(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "偏好設定(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "結束(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "關於(_A)"
 
diff --git a/po/zh_TW.po b/po/zh_TW.po
index 35a6029..38124d0 100644
--- a/po/zh_TW.po
+++ b/po/zh_TW.po
@@ -14,7 +14,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Jeff Huang <[email protected]>, 2018\n"
 "Language-Team: Chinese (Taiwan) (https://www.transifex.com/mate/teams/13566/zh_TW/)\n"
@@ -456,7 +456,7 @@ msgid "64-bit"
 msgstr "64 位元"
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr "偏好設定"
 
@@ -510,7 +510,7 @@ msgid "MATE Calculator"
 msgstr "MATE 計算機"
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr "計算機"
 
@@ -1164,12 +1164,12 @@ msgstr "符號函數"
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr "轉為"
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr "切換轉換單位"
 
@@ -1243,7 +1243,7 @@ msgid "Displayed value not an integer"
 msgstr "顯示的數值不是整數值"
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 
@@ -1251,45 +1251,45 @@ msgstr "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr "度"
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr "弧度"
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr "梯度"
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr "自動"
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr "固定的"
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr "科學計算"
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr "工程"
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr "顯示小數點後 %d 位數(_P)"
@@ -1349,70 +1349,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr "附有財務及科學計算模式的計算機。"
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr "計算機(_C)"
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr "模式(_M)"
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "說明(_H)"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr "基本模式(_B)"
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr "進階模式(_A)"
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr "財務計算模式(_F)"
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr "軟體開發(_P)"
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "內容(_C)"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "複製(_C)"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "貼上(_P)"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "復原(_U)"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "重做(_R)"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "偏好設定(_P)"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "結束(_Q)"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "關於(_A)"
 
diff --git a/po/zu.po b/po/zu.po
index 83b2bbc..73f2341 100644
--- a/po/zu.po
+++ b/po/zu.po
@@ -11,7 +11,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: MATE Desktop Environment\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-06-14 15:15+0200\n"
+"POT-Creation-Date: 2019-02-09 20:37+0100\n"
 "PO-Revision-Date: 2018-03-11 16:33+0000\n"
 "Last-Translator: Stefano Karapetsas <[email protected]>, 2018\n"
 "Language-Team: Zulu (https://www.transifex.com/mate/teams/13566/zu/)\n"
@@ -451,7 +451,7 @@ msgid "64-bit"
 msgstr ""
 
 #. Title of preferences dialog
-#: ../data/preferences.ui.h:9 ../src/math-preferences.c:238
+#: ../data/preferences.ui.h:9 ../src/math-preferences.c:239
 msgid "Preferences"
 msgstr ""
 
@@ -502,7 +502,7 @@ msgid "MATE Calculator"
 msgstr ""
 
 #. Title of main window
-#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:562
+#: ../data/mate-calc.desktop.in.h:2 ../src/math-window.c:563
 msgid "Calculator"
 msgstr ""
 
@@ -1143,12 +1143,12 @@ msgstr ""
 
 #. Label that is displayed between the two conversion combo boxes, e.g.
 #. "[degrees] in [radians]"
-#: ../src/math-converter.c:414
+#: ../src/math-converter.c:412
 msgid " in "
 msgstr ""
 
 #. Tooltip for swap conversion button
-#: ../src/math-converter.c:429
+#: ../src/math-converter.c:427
 msgid "Switch conversion units"
 msgstr ""
 
@@ -1222,7 +1222,7 @@ msgid "Displayed value not an integer"
 msgstr ""
 
 #. Digits localized for the given language
-#: ../src/math-equation.c:1918
+#: ../src/math-equation.c:1916
 msgid "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F"
 msgstr ""
 
@@ -1230,45 +1230,45 @@ msgstr ""
 #. calculations
 #. FIXME: Approximations of 1/(units in a circle), therefore, 360 deg != 400
 #. grads
-#: ../src/math-preferences.c:255 ../src/unit-manager.c:54
+#: ../src/math-preferences.c:256 ../src/unit-manager.c:54
 msgid "Degrees"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use radians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:259 ../src/unit-manager.c:55
+#: ../src/math-preferences.c:260 ../src/unit-manager.c:55
 msgid "Radians"
 msgstr ""
 
 #. Preferences dialog: Angle unit combo box: Use gradians for trigonometric
 #. calculations
-#: ../src/math-preferences.c:263 ../src/unit-manager.c:56
+#: ../src/math-preferences.c:264 ../src/unit-manager.c:56
 msgid "Gradians"
 msgstr ""
 
 #. Number display mode combo: Automatic, e.g. 1234 (or scientific for large
 #. number 1.234×10^99)
-#: ../src/math-preferences.c:273
+#: ../src/math-preferences.c:274
 msgid "Automatic"
 msgstr ""
 
 #. Number display mode combo: Fixed, e.g. 1234
-#: ../src/math-preferences.c:277
+#: ../src/math-preferences.c:278
 msgid "Fixed"
 msgstr ""
 
 #. Number display mode combo: Scientific, e.g. 1.234×10^3
-#: ../src/math-preferences.c:281
+#: ../src/math-preferences.c:282
 msgid "Scientific"
 msgstr ""
 
 #. Number display mode combo: Engineering, e.g. 1.234k
-#: ../src/math-preferences.c:285
+#: ../src/math-preferences.c:286
 msgid "Engineering"
 msgstr ""
 
 #. Label used in preferences dialog.  The %d is replaced by a spinbutton
-#: ../src/math-preferences.c:296
+#: ../src/math-preferences.c:297
 #, c-format
 msgid "Show %d decimal _places"
 msgstr ""
@@ -1312,70 +1312,70 @@ msgid "Calculator with financial and scientific modes."
 msgstr ""
 
 #. Calculator menu
-#: ../src/math-window.c:395
+#: ../src/math-window.c:398
 msgid "_Calculator"
 msgstr ""
 
 #. Mode menu
-#: ../src/math-window.c:397
+#: ../src/math-window.c:400
 msgid "_Mode"
 msgstr ""
 
 #. Help menu label
-#: ../src/math-window.c:399
+#: ../src/math-window.c:402
 msgid "_Help"
 msgstr "_Usizo"
 
 #. Basic menu label
-#: ../src/math-window.c:401
+#: ../src/math-window.c:404
 msgid "_Basic"
 msgstr ""
 
 #. Advanced menu label
-#: ../src/math-window.c:403
+#: ../src/math-window.c:406
 msgid "_Advanced"
 msgstr ""
 
 #. Financial menu label
-#: ../src/math-window.c:405
+#: ../src/math-window.c:408
 msgid "_Financial"
 msgstr ""
 
 #. Programming menu label
-#: ../src/math-window.c:407
+#: ../src/math-window.c:410
 msgid "_Programming"
 msgstr ""
 
 #. Help>Contents menu label
-#: ../src/math-window.c:409
+#: ../src/math-window.c:412
 msgid "_Contents"
 msgstr "_Iziqikithi"
 
-#: ../src/math-window.c:412
+#: ../src/math-window.c:415
 msgid "_Copy"
 msgstr "_Kopisha"
 
-#: ../src/math-window.c:414
+#: ../src/math-window.c:417
 msgid "_Paste"
 msgstr "_Namathisela"
 
-#: ../src/math-window.c:416
+#: ../src/math-window.c:419
 msgid "_Undo"
 msgstr "_Ungakwenzi"
 
-#: ../src/math-window.c:418
+#: ../src/math-window.c:421
 msgid "_Redo"
 msgstr "_Yenza futhi"
 
-#: ../src/math-window.c:421
+#: ../src/math-window.c:424
 msgid "_Preferences"
 msgstr "_Okuthandekayo"
 
-#: ../src/math-window.c:423
+#: ../src/math-window.c:426
 msgid "_Quit"
 msgstr "_Phuma"
 
-#: ../src/math-window.c:440
+#: ../src/math-window.c:443
 msgid "_About"
 msgstr "_Nge"