On single account systems we don't show the login button but the user should still be able to set system-wide locale settings. We can simply export the user's own settings to the system in that case. https://bugzilla.gnome.org/show_bug.cgi?id=694922
As we need that to get the right name from "hostname".
Allow setting the computer's pretty hostname if the user is an admin. https://bugzilla.gnome.org/show_bug.cgi?id=679281