When one of the menubar actions changed, we would omit to
update several properties on the platform menu, most notably
its title.
Manual tested with BigMenuCreator, where the sequence
menu->addAction(action); // A-operation
action->setMenu(submenu); // S-operation
would result in an "Untitled" menubar item on macOS, and this
regardless of when the submenu is populated.
Change-Id: I43989f36f6bf3f0b7056310ac986c06f8e02f128
Reviewed-by: Dmitry Shachnev <mitya57@gmail.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
7986e1e2f0