Group membership in rt 5.0.2

Hello, while testing version 5.0.2,
I wonder how can I see or modify the Group members.
From root account web interface, I go to Admin->Groups->Select, then I click on a Group and I only see its “Basics” (Name, Description, Enabled checkbox).
How can I navigate to the members of the group (and other settings)?

Even when I go to Search->Users and select a user, I cannot see the Groups he/she belongs to!

Is it possible that part of the page menu is missing in my installation?