Sync frequency adapted
Sync frequency adapted

Now forcing sync when watchface was left and last_sync was more than 15 minutes ago.
Also, sync frequency now increases if there are elapsed events in the database (so it should somewhat adapt to the 'busy-ness' of your schedule)
JanBobolz/agendwatchfacePebble,JanBobolz/agendwatchfacePebble,JanBobolz/agendwatchfacePebble