gnome-control-center has new translatable strings

[Sebastien Bacher]

Hello translators,

The new gnome-control-center, gnome-display-properties capplet strings
were not exported correctly in the template and not available on
rosetta, that has been corrected some days ago. The change are specific
to Ubuntu and will not be translated in GNOME so the Ubuntu translation
teams should use rosetta to translate those

Sebastien Bacher