This makes loading faster, with less I/O, avoids unnecessary
code duplication (around 1k lines shaved), and ensures that
all the panels link and work appropriately.
By the same token, it will stop external panels from being
created, and loaded.
https://bugzilla.gnome.org/show_bug.cgi?id=690036
This property can be used to name services running on the machine
such as media sharing, device sharing, or externally visible
services such as the Bluetooth name.
We don't set the statis hostname yet though, this will need
to be done to follow the recommendations from systemd.
https://bugzilla.gnome.org/show_bug.cgi?id=650044