[BUG] Fix the groups page

[albert118]

The groups page isn't pulling real member data for the rows and also has an extra button for creating a group.

Let's correct the data hook usage in the container and double check the mappings. While we're here we can also remove the extra button on the top left of the page.

[willyyto]

This is working fine on mine. It might be because you dont have a group assigned to the studentcontact

[willyyto]

[albert118]

sike never accepted any invitiations