TrackBarControl 1.7.5 Release

• When dragging the control's thumb from position 0 to 2, the event order now will be as follows:
  1) PositionChanging with change type pctBeginTrack, new position 1 (on thumb's first move)
  2) PositionChanged with change type pctTracking, new position 1
  3) PositionChanging with change type pctTracking, new position 2
  4) PositionChanged with change type pctTracking, new position 2
  5) PositionChanged with change type pctEndTrack, new position 2 (on releasing the mouse button)
  Previously it has been:
  1) PositionChanging with change type pctTracking, new position 1
  2) PositionChanged with change type pctTracking, new position 1
  3) PositionChanging with change type pctTracking, new position 2
  4) PositionChanged with change type pctTracking, new position 2