Issue #226: User Stream "delete" message not sent for direct messages received by the Authenticated User

Delete messages for received DMs aren't being sent to the User Stream. Hopefully the below explains it a bit better.

Authenticated user deletes a sent DM. Delete received
Authenticated user delete a received DM. No Delete received
Other user deletes a message sent from Authenticated User. Delete received.
Other user deletes a message received by Authenticated User. No Delete received