Show the newsletter when navigating after success (bug 1113354)

![newsletter-refresh-loop mov](https://cloud.githubusercontent.com/assets/211578/5498434/c05a4922-86e4-11e4-91a8-123cf40be74c.gif)

So, with that function, we now have 3 different places that render the same template. That's 3 different places where we need to pass the same context. I think we need to refactor all that somehow - not sure how, though.