Top level i18n menu highlighting

[snooze]

I'm looking for a simple method for designating top level menus as having submenus when all are collpsed. The total number of items makes the entire menu too long so I am using it without Showall. It could be as simple as bold text for those with top submenu items. Just a visual cue for the user to expand to see more. Ultimately, I would like to have a triangle arrow that rotates. Now that I think about it, plus and minus signs would be ideal.

SNZ