- this fixes a long-standing annoyance that popped up also from time to time in the forum:
the post objects deliver information via its coloring but a selection in the tree changed the shape color
Even experienced users like me did not know about the SelectionStyle property and always had to click into the model to see the real color, not the selection color.
Therefore SelectionStyle set to BoundBox is sensible as default settings for post objects since this assures that the users always see the right coloring.