Reset the content state after dropping so dragged nodes don't remain :active (48857). r=saari sr=ben

content/events/src/nsEventStateManager.cpp

@@ -905,6 +905,7 @@ nsEventStateManager :: BeginTrackingDragGesture ( nsIPresContext* aPresContext,
 void
 nsEventStateManager :: StopTrackingDragGesture ( )
 {
+  SetContentState(nsnull, NS_EVENT_STATE_ACTIVE);
   mIsTrackingDragGesture = PR_FALSE;
   mGestureDownPoint = nsPoint(0,0);
   mGestureDownFrame = nsnull;