Delete coerce minimum and maximum because they are not needed and lead to bugs when LowerValue > 0
Temporary fix for correct width calculation. On every minimum and maximum update Lower and Upper values now checked for correctness. That leads rangslide width to calculate correctly.
This issue happen if lower and upper valued were not set by user.
Second try:
Coerce minimum and maximum now return value without chek (temporary solution)
Width calculation fixed.
Coerce Lower/Upper value change check from < to <= and from > to >= to fix issue with incorrect setting Lower or Upper Value if this value = Minimum or Maximum.
Introduced DragStarted, DragCompleted and DragDelta events for Lower, Upper and Central Thumb.