Backdrops for visually grouping the nodes

[PaulSchweizer]

Most node based applications provide visual backdrops or groups.

Not sure how to implement it here and what would make sense. This would probably need something in flowpipe as well

[jonassorgenfrei]

NodeGraphQt brings the option to have a backdrop:

or
a group node:

Backdrop would probably be easier, with group nodes we have to add some dive-able logic to same, but the ui would be more clean i guess

[jonassorgenfrei]

If we would want to support looping in the future we might need to extend the ui logic by adding some ui for node group connections