Menu item with list of published groups visible even when access control disabled

How to reproduce

• In the olat.local.properties set resource.accesscontrol.enabled=false (In fxOpenOLAT this can be done in the admin GUI)
• Start OpenOLAT and login
• Go to group tab
  => Menu item "Published groups" is visible

Since publishing of groups is only possible via access control it makes no sense to show this (empty) list here. It should not be displayed in that case.