I18n: Update translation nl (100%).

219 translated messages.

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

219 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Warn when no lock tool succeeded (Bug 6413)

This patch now pops up a dialog when locking the screen fails
either from a lock on lid-close or when going to suspend. If from
suspend it will allow the user to choose wether to continue with
the suspend operation.
I18n: Update translation nl (100%).

224 translated messages.

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