Hide guess queue functionality when queue is disabled

[jpd236]

One of our hunt operators was giving JR a test-run this weekend and pointed out a few peculiarities when the guess queue is disabled:

• When someone solves a puzzle, the answer pop-up appears with buttons like "Correct", "Intermediate", etc. They are correctly disabled, but should they even be visible in the first place?
• The guesses page itself shows confidence/direction, which you don't have a way of setting (unless you return the answer to the queue first, which arguably shouldn't be possible either).

My thinking is that all of this functionality, including the "Return to queue" button, should be hidden if the queue is disabled for a hunt. You can always go and toggle it on if you want that functionality again, but if you're opting not to use the queue, it just seems to me like clutter to have these elements visible.