- if an endtime leads to a duration biger the the difference between day-start and -end, the day-end from the user prefs are ignored, else it would never find a free time
- using one selectbox for the duration with an extra item 'use enddate', to be more intuitive about duration or enddate is used
- selecting a fitting search-frame for new searches, not just one week
- for existing events, the own event is now excluded from the busy-time
- a warning is given, if the freetime search is called for a recuring event: Only the initial date of that recuring event is checked!
