Updated old tests for ajax proof feedback div

* No longer inside #content so selector updated
* No longer removed by ajax so run both javascript and non-javascript
  tests now
Test expected report a problem behaviour

Monkeypatch to stub report a problem html as under test slimmer doesn't
put any of the real content in. Added just enough markup to demonstrate
correct behaviour of the smart-answers code to avoid replicating slimmer
tests.
Two Failing tests left:
 * Shouldn't show on question pages
 * Url not being set in form on outcome