dbustray: add NewMenu signal and emit it when menu changed

This is a signal that is not actually supported by the
StatusNotificationIcon standard, but it comes to be important
for the Qt implementation of it, in fact qt apps might
not have a menu, when exporting the Menu path as /NO_DBUSMENU
or they could add this later in the execution.
So, currently there's no way for the StatusNotificationWatcher
to know when a menu has been added (or changed).

Adding a NewMenu signal won't cause any troubles, but will
allow watchers to be notified properly on menu addition.

Change-Id: I9a8b00213f5023950811af1d62cd91bc51744b78
Reviewed-by: Dmitry Shachnev <mitya57@gmail.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

0 files changed, 0 insertions, 0 deletions