and some more webdriver test updates
update title test
Fix language display on the application page (#1920)
Fix UnicodeError with video metadata (#1918)
Fix task assign drop down #1919

The issue was USER_LANGS was not being set correctly anymore.  We
actually don't even use that variable now, so just remove it.
Don't cache the login link for anonymous users (#1921)

The link includes the request path, so we don't want to cache it.
It's cheap to generate in any case.
One more quick fix for #1922
Merge branch 'staging' into production