Single-item submenus inevitably occur at some point if the submenu is filled out programatically (as smackfu pointed out). A list of recently open files is a go

Single-item submenus inevitably occur at some point if the submenu is filled out programatically (as smackfu pointed out). A list of recently open files is a good example. While it's possible to move the single item into the parent menu, that would make the menu confusingly inconsistent.