when dragging a tab over the "all tabs" button, act as if we are dragging over the "scroll down" button r=mconnor git-svn-id: svn://10.0.0.236/trunk@232769 18797224-902f-48f8-a5cc-f745e15eee43
when dragging a tab over the "all tabs" button, act as if we are dragging over the "scroll down" button r=mconnor git-svn-id: svn://10.0.0.236/trunk@232769 18797224-902f-48f8-a5cc-f745e15eee43