Roster: Register our-show with lower priority

This event is used to shutdown the roster if we quit, it destroys all windows.

This should be run last because other objects like the ChatControl need a reference to the window to shutdown properly

gajim/roster_window.py

@@ -5908,7 +5908,7 @@ def _open_wizard():
             self._nec_roster_received)
         app.ged.register_event_handler('anonymous-auth', ged.GUI1,
             self._nec_anonymous_auth)
-        app.ged.register_event_handler('our-show', ged.GUI1,
+        app.ged.register_event_handler('our-show', ged.GUI2,
             self._nec_our_show)
         app.ged.register_event_handler('connection-type', ged.GUI1,
             self._nec_connection_type)