[PD-697] Hides page content from unverified users, presenting them with an opportunity to activate their account.

This doesn't take care of the case where users can access features by visiting a URL directly. Given that I'll be writing a decorator in a new ticket, I didn't want to do the work twice. 
I was originally going to replace this with a selenium test to make sure the notice is shown, but selenium is being silly at the moment, so I'll just write an old-fashioned BS test. (beautiful soup)