It's now possible to add a GMenu as a submenu of another GMenu.
Simply use the GMenu::add_submenu(NonnullOwnPtr<GMenu>) API :^)
The WindowServer now keeps track of a stack of open menus rather than
just one "current menu". This code needs a bit more work, but the basic
functionality is now here!
Any GAction that has an icon assigned will now show up with that icon
when added to a menu as well.
I made the menu items 2px taller to accomodate the icons. I think this
turned out quite nice as well :^)
They show up as checkable GButtons in GToolBar, and with (or without) check
marks in menus.
There are a bunch of places to make use of this. This patch only takes
advantage of it in the FileManager for the view type actions.
The enabled state of a GAction now propagates both to any toolbar buttons
and any menu items linked to the action. Toolbar buttons are painted in
a grayed out style when disabled. Menu items are gray when disabled. :^)
