[UI - Rights] Differences between side and top bar + Empty groups
Difference between sidebar and topbar: When an user doesn't have the right
Userview - Update, he's not able to see groups/views on sidebar. On topbar, he's able to see all groups (without views). If he doesn't have this right, he shouldn't see any groups/views.
- When an user doesn't have right to see any view in a group, this group shouldn't appear on sidebar/topbar