Freeze break request for GNOME Shell

[Florian Müllner <fmuellner gnome org>]

Oh my, it's this time of the year again ...

When the new status menu work landed, the "Notification" switch that
used to be in the user menu was removed, although according to the
mockups[0] it should be included in the message tray menu - I'd like
to land this[1] now for 3.10.1.

At this point in time, this constitutes both a UI and string freeze
break, though it restores functionality that has been around for quite
some time (3.4?) and was only removed late this cycle, so I suspect
that there are translations/documentation that can be resurrected.


Cheers,
Florian

[0] https://wiki.gnome.org/GnomeShell/Design/Guidelines/SystemStatus/
[1] https://bugzilla.gnome.org/show_bug.cgi?id=707073