recently used documents were incorrectly sorted on when a file was first added to recently-used.xbel file, not reflecting when it was opened again later
this fix changes it so they are sorted correctly on when they were last used (when last their entry was modified in recently-used.xbel)
fixes https://github.com/linuxmint/mint20.2-beta/issues/10
* initial cleanup with some debug messaging
* further cleanup, mostly coding style
* - more cleanup, and speed-up
- more fixes, including many icon and encoding related issues
- replace some icons and remove compile.py
- prepare for python3 port as much as possible
* remove some more unneeded files, few left-over cleanups
* move some external scripts to python3 already
* Fix and clean up add_search_suggestions and add_apt_filter_results logic
* more cleanup, thx Codacity
* fix issue with a path
* add a killall to the test script, fix a method declaration
* fix custom colour setting
* keybinding: re-add GdkX11
* re-add mint-common dep
* Use os.path.expanduser("~") instead of os.environ
* revert re-add GdkX11, but import Gtk first
