add feature to extend preclusive zone alarm state by x frames
include ExtendAlarmFrames in Presets and enable input for preclusive zones only
Merge master
add ExtendAlarmFrames Fields to Zones and ZonePresets
Revert changelog modification
make db update safe to run multiple times
Merge pull request #338 from m-bene/extendPreclusive

add feature to extend preclusive zone alarm state by x frames