Merge branch '205-follow-up-from-add-docs' into 'master'

Resolve "Follow-up from "Add docs""

Closes #205

See merge request !283

docs/admin/30_configure.rst

@@ -46,4 +46,7 @@ like class representatives or ventilation services can be defined here.
 
 .. image:: ../_static/edit_group_role.png
   :width: 100%
-  :alt: Form for managing a group role
\ No newline at end of file
+  :alt: Form for managing a group role
+
+Group roles can be managed via menu entry "Manage group roles" located in
+the submenu "Class register".