Attribute form enhancement (display and editing)

[leolami]

Checklist

• [x] I've searched through the current issues to make sure this feature hasn't been requested already.

Motivation

The separation between the fields placed in groups and the external ones is not clear

Suggested solution

Format the group by adding a thin border that encloses the fields inside the group

This aspect must also be managed for the editing form

Alternatives considered

No response