call delegate when submenu open and close

AppKit/CPMenu/_CPMenuManager.j

@@ -375,6 +375,8 @@ var STICKY_TIME_INTERVAL            = 500,
     var count = _menuContainerStack.length,
         index = count;
 
+    [newMenu _menuWillOpen];
+
     // Hide all menus up to the base menu...
     while (index--)
     {
@@ -394,6 +396,8 @@ var STICKY_TIME_INTERVAL            = 500,
 
         [_CPMenuWindow poolMenuWindow:menuContainer];
         [_menuContainerStack removeObjectAtIndex:index];
+
+        [menu _menuDidClose];
     }
 
     if (!newMenu)