As global space scaling is not supported, the scaling algorithm could
be simplified a lot. Now scaling gizmos work off the relative distance
along the scaling rod/plane instead of going through global space,
removing the need for complicated and error prone transformations.
Change-Id: Iaf0d5b2f31f10ae0b26b6a59b36e9ee4498838c9
Fixes: QDS-1269
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
5a4b0b565a