- adjusted TestShapeGroupCommand. also some positions changed due to the
  due to the way, they are computed. absolutePositions of shapes are the
  same.
- added a test for scaling a group. with group size 0,0 it doesn't fail
o fixed a bug when ungrouping a shape
- we have to do the same calculation as in
  KoShape::absoluteTransformation
- added a test for this
o added comment in KisShapeLayer::transform, that krtia doesn't support
  inheriting transformations. currently no krita enabled shape uses
  this.

BUG: 227512

svn path=/trunk/koffice/; revision=1175147