- Currently, to create a new menu from an existing submenu, you have to
right-click a launcher on that submenu, then select "Entire Menu->Add as
new menu".  It would be much more intuitive if you could right-click on the
parent menu item itself (e.g. "Accessories", "Games" etc.) and pop-up a
menu containing:

   Add to Panel as _Menu
   Add to Panel as _Drawer
   ---
   Add _Item...
   ---
   _Properties

but currently there is no right-click menu for such items.

- As an alternative to right-clicking, you should be able to focus a menu
item and press Shift+F10 to pop up its context menu.  This is not currently
possible, the whole menu structure just disappears when you try it.

- All items on a menu item's right-click menu need accelerator keys.  Also
suggest renaming/re-ordering the menu items on this menu, to something
like:

   _Add to Panel
   _Run...
   ---
   _Delete
   ---                            
   _Properties (no ellipsis)

The 'Entire Menu' submenu could be removed if you could right-click on the
parent menu item as described above.  Which would be no bad thing, as
"Entire Menu" is a horrible phrase :)

- Right-clicking on an item on the Actions menu activates that item.  For
consistency with the Applications menu, this probably shouldn't happen-- it
should either pop up a similar context menu to that for launchers on the
Applications menu, or the right click should just be ignored.