kivy: fix menu dismiss

gui/kivy/main.kv

@@ -338,7 +338,8 @@
 
 <ActionOvrButton@ActionButton>
     on_release:
-        Clock.schedule_once(lambda dt: self.parent.parent.dismiss() if self.parent else None, 0.05)
+        # fixme: the following line was commented out because it does no seem to do what it's intended:
+        # Clock.schedule_once(lambda dt: self.parent.parent.dismiss() if self.parent else None, 0.05)
         Clock.schedule_once(lambda dt: app.popup_dialog(self.name), 0.05)