Fixing flash so that it's removed when you get it, so that flash messages aren't persistent.
Fixing flash so that it's removed when you get it, so that flash messages aren't persistent.

--HG--
extra : convert_revision : svn%3A77541ad4-5f01-0410-9ede-a1b63cd9a898/trunk%404169

lucius-feng/tg2,lucius-feng/tg2