properly handle updates occurring on shapes due to mouse events
properly handle updates occurring on shapes due to mouse events

lucalianas/ome_seadragon,crs4/ome_seadragon,lucalianas/ome_seadragon,lucalianas/ome_seadragon,lucalianas/ome_seadragon,crs4/ome_seadragon,crs4/ome_seadragon,crs4/ome_seadragon