Initialize asyncio event loop before using it

Python 3.14 (in Fedora 43) throws RunetimeError if event loop is not
initialized before using it.

Resolves: QubesOS/qubes-issues#10188

Author: alimirjamali

qubes_menu/appmenu.py

@@ -550,7 +550,8 @@ def main():
     dispatcher = qubesadmin.events.EventsDispatcher(qapp)
     app = AppMenu(qapp, dispatcher)
     if HAS_GBULB:
-        loop: gbulb.GLibEventLoop = asyncio.get_event_loop()
+        loop: gbulb.GLibEventLoop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
         loop.run_forever(application=app, argv=sys.argv)
     else:
         app.run(sys.argv)

qubes_menu/desktop_file_manager.py

@@ -308,7 +308,8 @@ def _initialize_watchers(self):
                pyinotify.IN_MODIFY | pyinotify.IN_MOVED_FROM | \
                pyinotify.IN_MOVED_TO
 
-        loop = asyncio.get_event_loop()
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
 
         self.notifier = pyinotify.AsyncioNotifier(
             self.watch_manager, loop,