Menu item link classes do not indicate "current" for parent item/s

[youngmicroserf]

In a hierarchical menu structure, it is often useful to be able to be able to differently style the current page's parent/grandparent/etc. differently from other parents. When testing a multi-level menu with the Twenty-Ten theme, "current-menu-item" is displayed in the selected page's class list, yet there is no attribute to identify the current selection's parent, grandparent.

Not sure if this is a bug or a feature. But I think it would be very useful to add this to the class list.

<div id="menu-menu-1" class="menu-header">
 <ul class="menu">
  <li id="menu-item-2754" class="menu-item menu-item-type-post_type  menu-item-object-page"><a target="_self" href="#">photos</a>

   <ul class="sub-menu">
    <li id="menu-item-2755" class="menu-item menu-item-type-post_type  menu-item-object-page"><a target="_self" href="#">Work Photos</a></li>
    <li id="menu-item-2761" class="menu-item menu-item-type-post_type  menu-item-object-page current-menu-item"><a target="_self" href="#">Holiday Photos</a></li>
   </ul>	
  </li>
 </ul>
</div>

OK, I was first ;), but I think this is a duplicate of http://core.trac.wordpress.org/ticket/12812, and there's more input there already...

#12812