Handle shift key release to prevent showing marking cursor
Use reflection to create ImageFrame for snapshots
Accept tracker-X.XX-SNAPSHOT.jar for preferred Tracker version
Handle null mouse events in getInteractive() w/o null pointer exception
Refresh toolbar calibration tool button when loading
Catch occasional exception when loading table
Set velocity and acceleration stretch independently
Update slovak properties and release version 4.83b
Merge branch 'db_develop' into forOSX