Growing a subprocess overlaps following content

[volkergersabeck]

When a user adds further elements inside a subprocess such that the subprocess grows
Then it starts to overlap following elements

Expected behaviour: when growing a subprocess, also move any following elements as if the space tool were used.

[nikku]

This is related to a flow element local space tool, as described in #876.

[ingorichtsmeier]

But, if I work on a collaboration diagram, the other pools should be kept untouched. Space tool is not the right option here.

[nikku]

@ingorichtsmeier As mentioned in my previous comment, a proper solution would most likely not apply the current global space tool behavior we got today but a container (or flow local) space tool as described in #876.

We would need to experiment with an improved space tool to see in which exact circumstances it would work (and in which it won't).