gnome-bluetooth string changes

[Bastien Nocera <hadess hadess net>]

Heya,

gnome-bluetooth had a UI review during GCDS, and I committed a number of
string changes to gnome-bluetooth in the past couple of days to fix a
number of problems with the UI.

The biggest changes were of a change from the use of passkey to PIN for
the identifier exchanged between devices, which should be copy/pastable
from the old translations for a number of languages.

Let me know of any problems.

Cheers