This commit changes the form that the user sees when inviting or editing
another user, if the service has the ‘caseworking’ permission set.
This will allow creating a new type of user, one who only has the
`send_messages` permission, without the `view_activity` permission.
We are doing this because we think there are a number of services with a
lot of users who don’t need to see the dashboard, or the other team
members, and that we can make a simpler interface for these users.
f4d2958d58