Fix failing tests on master

The sorting questions methods changed on stage, so I updated the test for <code>sorting_by_solved_questions</code>, also fixed the tests because it was a False Positive.
There is no longer <code>sort_by_no_replies</code> so I updated the test to sort by New Questions, since those are the questions with no replies. Is this ok with you?

I cherry-picked 1 commit I needed from prod branch