Permit to disable to edit groups for non-admin user

[vinyll]

Right now a non-admin can modify a group and edit the name and the list of members.
That's very much error prone for a newcomer.

If that's useful for some organisations, we should be able to disable from the config the access to that functionality.

[almet]

Hey @vinyll and thanks for opening this issue :-)

This is actually thought as a feature : when you join as a new user, if nobody in your group has already signed up, the idea is to list the members of your group.

That's done for two reasons :

• they can be notified when you order, or edit an order ;
• they don't have to join a group themselves when they join.

In my group, we also use this as a contact list : if we need to contact the group, then we have their emails.

I'll read your code now :-)