I18n: Update translation ast (94%).

372 translated messages, 21 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Applications Menu: changed default button title to "Applications"
Tasklist, blocking event interfered with button highlight.

Especially visible with minimized windows. The button was stuck
in "half active" state (normally inactive, but rendered as active when
mouse cursor was above it).
I18n: Update translation hr (100%).

394 translated messages.

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

394 translated messages.

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

394 translated messages.

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