Fixed apparent merge-error in Operation Store

Don't use the Alarm-time when persisting an Operation. This is dangerous because it can mess up sorting (especially when developing), and is technically wrong too. The "Timestamp"-column is currently interpreted as the timestamp of the alarm-income, not the actual alarm time. This will be cleaned up when the new database structure is finished!
Fixed discrepancy of days and minutes

Corrected days to minutes. Fixed Operation Store having days, and others
requesting minutes.