clutter: Trigger immediate repick when pick actor is destroyed

Traditionally, the next repaint would also involve picking, which
would correct the actor under the pointer. This now does not happen
out of the box, so we really are waiting for the next pointer event
here.

To avoid the pointer/cursor to lag behind, trigger an immediate
repick here, that will look up the new actor under the pointer
coordinates.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1915>

clutter/clutter/clutter-stage.c

@@ -3269,12 +3269,10 @@ on_device_actor_destroyed (ClutterActor       *actor,
   /* Simply unset the current_actor pointer here, there's no need to
    * unset has_pointer or to disconnect any signals because the actor
    * is gone anyway.
-   * Also, as soon as the next repaint happens, a repick should be triggered
-   * and the PointerDeviceEntry will get updated again, so no need to
-   * trigger a repick here.
    */
   entry->current_actor = NULL;
   g_clear_pointer (&entry->clear_area, cairo_region_destroy);
+  clutter_stage_repick_device (entry->stage, entry->device);
 }
 
 static void