Contact groups visibility in what groups a contact is

Is your feature request related to a problem? Please describe.

If a contact is in more groups, that is not visible. In ealier versions, a hook was in the select list, so i was visiable. And die list in which groups a contact is, is not big enough to see an the first view, if someone is e.e.g in 6-10 Groups.

Describe the solution you'd like

A solution, that i can an the first view, in which groups a contact is - and hooks in the list to hook or unhook a group would nice.

Describe alternatives you've considered

No response

Additional context

I use the group feature in sales business to set every customer or prospect in different groups - some are in up to 10 groups.
At the moment i manage that with thunderbird 91 - would like to do that here in the nextcloud app, if the workflow would be practicable.
Thanks in advance for improving.

Start by locating the JavaScript view that displays a contact's groups and inspect how group membership is currently shown and changed. Done means the first view clearly shows all groups for contacts with many memberships and provides controls to add or remove groups.