CAL-658: Restore a key of Confirmation Form
Crowdin injections w45 (from 20131011 to 20131109). Update de, it, zh_CN.
Merge branch 'stable/4.0.x' into feature/4.0.x-translation

Conflicts:
	calendar-webapp/src/main/resources/locale/portlet/calendar/CalendarPortlet_de.properties
	calendar-webapp/src/main/resources/locale/portlet/calendar/CalendarPortlet_it.properties