Grouping: Add e2e tests once stable

[PaulL1]

[PaulL1]

This is a useful request, but not really in the current roadmap. We have far too many good ideas in the repository already, giving the impression that we have a project riven with defects.

Accordingly, I am leaving the enhancement tag on this, but closing it. If someone would like this functionality, we'd welcome a pull request that adds it.