Need to route messages to SAs to the owner of the SA. Add some detail on design.
Need to document the following expected behaviors:
- USer is logged in and an SA receives a newly arrived message
- User logs in and one of their SAs has some newly arrived messages
- User clicks the white icon and it turns grey even though they have not read the unread messages associated with the SA. What happens when they log out and then log back in? Does it go white again?