marked the property the tracks whether drag is in progress as public read-only, changed name to isDraggingProperty, see https://github.com/phetsims/scenery/issues/767
marked the property the tracks whether drag is in progress as public read-only, changed name to isDraggingProperty, see https://github.com/phetsims/scenery/issues/767

phetsims/scenery,phetsims/scenery,phetsims/scenery