* fix deprecations
* port to Gtk.Application
Gtk.main() and Gtk.main_quit() are dropped in gtk4 in favor of
subclassing Gtk.Application.
This commit also moves argument handling from a separate thread to
GtkApplication.do_startup().
* fix deprecations in settings dialog
* Added glade switch
* Added random order setting, reimplemented queue
* new_cycle fix
* build queue randomly
* Glade. Moved switch up
* added .pot translation
* trigger new_cycle each long break interval
* fix long break time
* shuffle queue when all breaks taken
