WIP: State the fact that also archived projects are deleted when a group is removed.

What does this MR do?

A group removal also deletes all archived project within this group. This MR makes this fact more visible.

Althoug it is stated that all projects are removed, it is not always visible that there are maybe archived projects contained in the group. This can cause a loss of archived projects.

A better understanding of the implications can help to prevent this.

Does this MR meet the acceptance criteria?

Performance and Testing

I can't think of any implications, as this MR only changes one sentence. Therefore no tests needed.

Security

I can't think of any security implications, as this MR only changes one sentence.