Fixing the drag-with-right-mouse-button issue, particularly in Mac/Canary. Now mouseButton can be specified for SimpleDragHandlers with the DOM MouseEvent values, or -1 to allow the handler to start a drag on any mouse button.
Fixing the drag-with-right-mouse-button issue, particularly in Mac/Canary. Now mouseButton can be specified for SimpleDragHandlers with the DOM MouseEvent values, or -1 to allow the handler to start a drag on any mouse button.

phetsims/scenery,phetsims/scenery,phetsims/scenery