Edit Item by Member of Owning Group

[brokkoli71]

User stories

When I am part of a Group, that owns an item, I should be able to edit this item

Dependencies

Depends on:

• 266

Acceptance Criteria

• [x] if item owned by Group, it should be editable for all members of this group

[antonneubauer]

this has been implemented. @brokkoli71 please verify on dev deployment and close if satisfied