Place panel switches into GtkListBox and change their
behaviour so that:
When "Notifications" switch is off, all other switches in the dialog are
insensitive.
"Notifications Banners" switch is off and insensitive when corresponding
panel switch is off.
"Show Message Content in Banners" switch is off and insensitive when switch
above is off.
"Lock Screen Notifications" switch is off and insensitive when corresponding
panel switch is off.
"Show Message Content on Lock Screen" switch is off and insensitive when switch
above is off.
https://bugzilla.gnome.org/show_bug.cgi?id=742521
Show applications using the message tray, and
allow configuring in what way the shell presents them.
The set of applications shown include all applications that ever
showed a notification in gnome-shell and all applications that have
a boolean X-GNOME-UsesNotifications key set to true in their desktop file.
https://bugzilla.gnome.org/show_bug.cgi?id=685928
