Add alert to existing participants if a new user is added to a conversation

[Mike Tougeron]

Currently there is an alert and email sent to the user who was added to the conversation. It would be nice to add an alert (and possibly email) that tells the current participants that a new user was added.

e.g., I open a conversation with Jack & Jill and allow them to add recipients. If Jack then adds Goldilocks an alert will be sent to Jill & myself that she was added.