We need to clear the message center and the message center view upon logout.
[master cd4a8bc] fixes this. When a user logs out, the message center is now cleared. Additionally, if the message center modal window is currently visible, it is made invisible.
verified 8/22.
changing status of VERIFIED BZs for JON 2.4.2 and JON 3.0 to CLOSED/CURRENTRELEASE