
Check if the event source is currently doing an async call, and prevent UI updates in that case. This avoids a flash of "No updates" when switching months. https://bugzilla.gnome.org/show_bug.cgi?id=641383
Check if the event source is currently doing an async call, and prevent UI updates in that case. This avoids a flash of "No updates" when switching months. https://bugzilla.gnome.org/show_bug.cgi?id=641383