+### mate-panel 1.21.3

+

+ update translations

+ Use make functions for HELP_LINGUAS

+ Check if manager->proxy is NULL

+ Migrate mate-panel from dbus-glib to gdbus

+ notification-area-preferences-dialog.ui: avoid GtkButton:use-stock

+ Fix GdkSeat warning

+ Ensure alt-F1 can show the menu even if no menu applet on panel

+ na-tray: add preferences dialog and applet menu entry

+ na-tray: wide panels, add GSettings to the applet

+ na-tray: wide panels, convert main GtkBox display to GtkGrid

+ na-tray: wide panels, preliminary batch box to grid rename

+ button-widget: wide panels, more suitable resize limits on Widgets and arrows

+ README - Add dependency list

+ update legal.xml

+ Clock applet help: To Adjust the System Date or Time

+ Clock applet help: Add Show week numbers in calendar

+ Clock applet help: Fix speed unit for meters per second

+