Allow profiles types to send messages without being connected

There has been a growing demand for users who have specific roles in the community or elearning site and need to send a private message to another user without having to be connected.

For example, Community Managers or Teachers who need to contact other members.

In this enhancement to Member Access Controls, we're going to add a new setting to allow specific profile types the permission to message any other user without being connected. Admins will have the option to enable messaging permissions for specific profile types,