fix xss issue for all dashboard redirect messages
fix xss issue for all dashboard redirect messages

edx-solutions/edx-platform,philanthropy-u/edx-platform,philanthropy-u/edx-platform,edx-solutions/edx-platform,edx-solutions/edx-platform,philanthropy-u/edx-platform,philanthropy-u/edx-platform,edx-solutions/edx-platform