Heads-up: a few string changes in gnome-bluetooth

[Bastien Nocera <hadess hadess net>]

Heya,

Those string changes were mistakes in the original strings. I fixed them
and changed the committed po files as appropriate:
https://bugzilla.gnome.org/show_bug.cgi?id=593565
https://bugzilla.gnome.org/show_bug.cgi?id=593170
https://bugzilla.gnome.org/show_bug.cgi?id=593564 (part of it)

Cheers