Fix Bug 1061565, show dialog on first question

@Rik r?
hmmm, so you wanna turn that into ConfirmController (or just Confirm) and do all those kinda show/hide dialog things in there? Currently it is just included on the question.html page and self executes adding a click listener to the dialog's button.

So, nothing is exposed to window at the moment. We of course can, but the function will probably simply be something like:

    function show_first_question_help() {
        dialog.classList.remove('hide');
     }

If you do not foresee confirm.js growing to much more, then perhaps we can trash it and move the current bits into question_controller.js