Add Save button to top of quizzes

Idea created by Gregory Mayes on Mar 14, 2018

    Blackboard had this feature and I found it useful.  Currently I really have to reduce the size of the quiz edit window a lot in order to be able to see the entire thing (or have access to a vertical monitor.) Especially when updating a lot of quizzes it would be really helpful to have the save button at both the top and the bottom so that you don't have to scroll to save each time. Alternatively, make Save responsive to the Enter key, though I can see how that might cause problems.