i18n: Update translation strings in all languages

The command used was the following:

   for pofile in *.po; do msgmerge -U --no-wrap $pofile ring-client-gnome.pot; done

Change-Id: Id89b188ffccab22fb6f72b1de36ea93f6154192f
[stepan.salenikovich@savoirfairelinux.com: added tuleap id]
[stepan.salenikovich@savoirfairelinux.com: removed unused (commented) translations]
Signed-off-by: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>
Tuleap: #967