I18n: Update translation ast (83%).

295 translated messages, 59 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation ast (91%).

325 translated messages, 29 untranslated messages.

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