Update translators, week 22.
Add error domain for XfceSmClient.
l10n: Updated Portuguese (Brazilian) (pt_BR) translation to 100%

New status: 164 messages complete with 0 fuzzies and 0 untranslated.

Transmitted-via: Transifex (translations.xfce.org).
l10n: Updated Polish (pl) translation to 100%

New status: 164 messages complete with 0 fuzzies and 0 untranslated.

Transmitted-via: Transifex (translations.xfce.org).
l10n: Updated Indonesian (id) translation to 100%

New status: 164 messages complete with 0 fuzzies and 0 untranslated.

Transmitted-via: Transifex (translations.xfce.org).
Update translators, week 23.