Sync translations with transifex
Add ability to enable/disable debug with GSettings

Based on similar commit in mate-session-manager.
Un-break my previous commit
Gtk+3: Fix label title label in msd-xrandr-manager
xrandr-manager: Fix memleak
Merge remote-tracking branch 'upstream/master'

Conflicts:
	plugins/xrandr/msd-xrandr-manager.c