I18n: Update translation zh_HK (97%).

219 translated messages, 5 untranslated messages.

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

224 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation zh_CN (97%).

218 translated messages, 6 untranslated messages.

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

224 translated messages.

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