> The "top level" items in the menu don't do anything, it's the sub-menu items that are relevant. > > Without getting too technical, each action has flags indicating circumstances in which it may not be used. The only action named "plugin.<something>" is "plugin.<menu>", which is not a real action, it's a layout instruction for the main context menu. So it's not allowed for a key-binding, and there's no sub-menu item for it. But we can't get at the internals of gtk's menu construction, to tell it to omit items for which there's no sub-menu.
I'm not sure that I understood this last part, but I thought that it would be nice to make these "top level" items deactivated (with a sort of grayish colour). I am talking about the items that are "top" inside the submenus. In practice these are not used and they distract attention, somewhat. -- Liviu