Extend the syncronisation state


#1

Extend the syncronisation state from date and time to date and time and state (failure, success) on all plattforms


#2

We can assume the specified synchronization date is the last successful sync.


#3

this is not true with a self hosted installation. i can shutdown the server, sync on my mobile and the mobile says failure and the date is refreshed at the time of the failure without status information


#4

the problem is still not fixed. i shutdown my onprem instance and the sync date and time updated, very bad