Bug 387990 [a11y] mouse pointer position can prevent keyboard access to submenus r=enndeakin sr=roc

layout/xul/base/src/nsMenuFrame.cpp

@@ -492,8 +492,9 @@ nsMenuFrame::HandleEvent(nsPresContext* aPresContext,
         if (IsMenu() && !onmenubar && IsOpen()) {
           // Submenus don't get closed up immediately.
         }
-        else
+        else if (this == mMenuParent->GetCurrentMenuItem()) {
           mMenuParent->ChangeMenuItem(nsnull, PR_FALSE);
+        }
       }
     }
   }