Problem Description: Users with group permissions can't create a group, inspect group detail, edit or delete the group. Permission errors are displayed.

Reproduce:
1. create user `testuser`
2. create group `testgroup`
3. add `testuser` to `tesgroup`
4. assign the existing role `galaxy.group_admin` to `testgroup`
5. login as `testuser`
6. visit `/ui/group-list`

7. unable to visit group detail or create a group:
     1. click on `create`, fill in `name` and click `create` in modal
     2. fails with `Permissions for group "testgroup" could not be displayed.` (identical error on visiting group detail`
 
8. unable to edit or delete a group:
   __   1. toggle kebab, click `Edit` or `Delete`
   2. fails with `Users list could not be displayed.`

Proposed Solution: Users with group permissions should be able to create a group, access group detail of created group, edit the group and delete the group.