Handle submenu items

From what I can determine this module handles sub-menu items but it doesn't appear to support expandable-collapsible items (Responsive Navigation 7.x-1.0).

I'm also confused about the "Menu depth" and "Show as expanded" options.

I have tested the following settings, clearing the cache each time, with the following results:

Menu depth   "Show as expanded" option  Open Position    Result
--------------------------------------------------------------------------------------------------
-1            no                        relative         Displays parent and child levels always expanded
0             no                        relative         Displays parent level only
1             no                        relative         Displays parent and child levels always expanded

-1            yes                       relative         Displays parent and child levels always expanded
0             yes                       relative         Displays parent level only
1             yes                       relative         Displays parent and child levels always expanded 

-1            no                        static           Displays parent and child levels always expanded
0             no                        static           Displays parent level only
1             no                        static           Displays parent and child levels always expanded 

-1            yes                       static           Displays parent and child levels always expanded  
0             yes                       static           Displays parent level only
1             yes                       static           Displays parent and child levels always expanded  

It appears that the "Show as expanded" option has no observable effect on the way the menu is displayed.

Is there another setting somewhere or a different styesheet that will provide expandable-collapsible menus with this module? Thanks.

The JS and CSS from responsive_navigation js does not provide CSS to theme an expanded menu item.

If you can come up with a way to make it work, please reopen and provide a patch.