The Gdk threading code is causing issue on Windows and this method
of moving the main loop to a thread has been deprecated and advised
against so removing without adding replacement as it currently
only creates one main thread and should still be fine.
If a blocking operation occures and needs solving, see the pygobject
guide for recommened way to use threads in Gtk:
https://pygobject.readthedocs.io/en/latest/guide/threading.html
84643fb6f7