Made a bunch of small changes to help pages get through accessibility screening.
Made a couple more small changes to allow for better navigation using tabs.  In particular some links changed the page visually, but not the focus.
Made set names labels for checkboxes on ProblemSets
Got font size wrong
Added MathView to GatewayQuizzes
Merge branch 'release/2.10' of https://github.com/openwebwork/webwork2 into 2.10-bugfixes
Cleaning up some fixes.
Fixed bug where hidden fields were showing up in sort menu on classlist editor.
Fixed a bug where in newer versions of cgi, CGI::pop_up will not respect the multiple attribute.
Cleaned up a couple of Hmwk Sets Editor bugs.  Now the form doesn't change styles semi-randomly and the multiple select isn't broken semi randomly
Fixed previous fixes in previous commit
Fixed some issues with the UserDetail page
-  Fixed reduced scoring date checking, which was off
-  Added datetimepickers to the page

Fixed some issues with DateTimePicker
-  Fixed the reduced scoring date checking, which was off
-  Added support for versioned sets
-  Added "changed" css back in.  (Why does it keep dissapearing?)
Tweaked ow the datepicker script deals with times.  Upgraded 'changed' to only highlight things which actually change.
Removed Course Configuration entry for DragMath since its out of date and presents duplicate options with the newer MathView.  It can still be enabled manually.
Tweaked the user settings page so that it doensn't have a superfluous "changed" message.
- Allow Hide Hints to be overridden
- Add ip checking to Problem.pm page
Fixed some colors in the overrides file and formatting in the login proctor page
Added restriction checking to gateway sets
Fixed reduced scoring and gateways.  The scores were always recorded correctly, but now they are also reported to students correctly.
Fixed some lingering datetimepicker corners.