Merge branch '334-modulecmd-un-using-a-group-is-broken' into 'master'
Resolve "modulecmd: un-using a group is broken"
Closes #334 (closed)
See merge request !313 (merged)
(cherry picked from commit 85000684)
d639c08b modulecmd: bugfix in un-using a group
Co-authored-by: gsell achim.gsell@psi.ch