I18n: Update translation ast (88%).

175 translated messages, 22 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation tr (99%).

196 translated messages, 1 untranslated message.

Transifex (https://www.transifex.com/projects/p/xfce/).