Displaying/Removing Log in/Sign up messages

[xinhuey]

Issue:
Currently, the message "signed in" persists even after the user has logged out of their account.

Fix:
System should remove the "signed in" message after user has logged out, or when the sign in form has been cleared.

Acceptance Criteria:

• ContactForm component should clear success message when PopUpPanels is down. This applies to sign up, sign in, and forgot password