Ticket #2165: basic version of the user-friendly skin selector.

Thanks Egmont Koblinger and Vitaliy Filippov for original patches.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Update po/*.po files.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Merge branch '2165_skin_selector'

* 2165_skin_selector:
  Update po/*.po files.
  Ticket #2165: basic version of the user-friendly skin selector.