I18n: Update translation cs (100%).

44 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation tr (100%).

44 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation it (100%).

44 translated messages.

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