Add account tag to allauth messages.
only send the English emails
pass next param to login_url helpers
add SignInTest for next url
Merge pull request #2599 from groovecoder/persona-allauth-next-url-test

add SignInTest for next url
Merge pull request #2598 from darkwing/persona-allauth

Add JS logic to place messages in correct places
Use our page title block and the helper to append "| MDN".
Fixed some leftover bugs from porting allauth's templates from Django to Jinja2.
Use correct block for extra JS.
Use spaces around double curly braces.
Rename oauth_login waffle flag to github_login.
Fix header notification margin