Hide menu if it loses keyboard focus

This will hopefully allow it to be dismissed by clicking elsewhere.

Author: DemiMarie

qui/tray/domains.py

@@ -524,6 +524,10 @@ def update_stats(self, memory_kb, cpu_usage):
 class DomainTray(Gtk.Application):
     ''' A tray icon application listing all but halted domains. ” '''
 
+    def hide_menu(self, _unused_event):
+        self.tray_menu.hide()
+        return False
+
     def __init__(self, app_name, qapp, dispatcher, stats_dispatcher):
         super().__init__()
         self.qapp = qapp
@@ -537,6 +541,7 @@ def __init__(self, app_name, qapp, dispatcher, stats_dispatcher):
             _('<b>Qubes Domains</b>\nView and manage running domains.'))
 
         self.tray_menu = Gtk.Menu()
+        self.tray_menu.connect('focus-out-event', self.hide_menu)
 
         self.icon_cache = IconCache()