Bjoern Rabenstein 7af42eda65 Optimize purging.
Now only purge if there is something to purge.
Also, set savedFirstTime and archived time range appropriately.
(Which is needed for the optimization.)

Change-Id: Idcd33319a84def3ce0318d886f10c6800369e7f9
2014-11-25 17:10:30 +01:00
..
2014-11-25 17:10:30 +01:00