Display the git branch along with directory name in icon view; when the directory is a git repository.

Obviously further work will be required to enable/disable as a displayed option, and potentially some level of customisation. This would require open discussion of possibilities.

Solutions for co-existence with other displayable parameters also to be community determined.

Consideration and feedback appreciated.

* Add UI support to enable/disable option

Added user interface support for option to enable and disable the display of the git branch name in icon view.

* Add internationsation support for the new feature

With translations for most of the currently supported languages.

* Update caja.pot

Build system regenerated .pot file with additional strings from new feature (already in previous commit), new strings already introduced to code-base, along with updated source file line numbers of existing strings. Required for the automated pull mechanism in Transifex - which should complete once merged with master branch.

This PR enables the displaying of Caja (as a file manager) for use in Budgie Desktop and XFCE. Prior to this commit, it would only be able accessible in MATE or with downstreams like Fedora patching in the support. The addition of these is important as file managers such as Nautilus adopt libadwaita and begin to directly come into conflict with user theming choices.

browser.xml: use two white spaces for indentation

make distcheck use /usr/local/bin and tarball include
caja.desktop with that wrong dir after
https://github.com/mate-desktop/caja/commit/abc7f2a