Diff for KronolithSystemCalendars between 2 and 3

+ Kronolith System Calendars

System Calendars are owned by nobody and can only be setup by administrators and you must be logged in with the mode set to "Basic".  One advantage is youadministrators. They do not seehave a user as "owner". In APIs and sync protocols, these calendars are identified by a pseudo owner -system-. In SQL backends, the owner's name displayed in the calendar listing as thereowner string usually is no owner.