You can now delete answers

[FEATURE] You can now delete Questions

[FUTURE] You should be warned if your question does not have any correct
answers or has more than one
[FUTURE] You should be warned if number of questions it takes to pass
the quiz is greater than the number of questions
[FUTURE] You should not be allowed to put 0 as the allowed attempts
[FUTURE] There should be a 'clean Question Order' in case the order is
off. For example if the first question is #2, a question is missing the
order, or there is a gap between questions