Moving union ingores groups

[JensWinkler91]

The current behavior

I'm using the following snippet to create a union that contains all current nodes and groups.
My goal is to select all nodes and groups so i can move them all at once.

const data = this.canvas.getDataMap();
this.canvas.add2Union("selectAll", data);

If i move a node, all other nodes are moved but the position of the groups do not change.

The expected behavior

I'd expect that the position of nodes and groups change.

Your environment(such as: Butterfly version、Browser version、OS and so on)

Butterfly version: 4.3.27

[noonnightstorm]

It`s a little difficult, may be I will support later.

[JensWinkler91]

Ok that would be great. Otherwise the behavior would be inconsistent.