Encorporated UX styling feedback and imporoved cross browser experience
Merge branch 'authoring' of https://github.com/edx/edx-ora2 into grady/styles

Conflicts:
	openassessment/xblock/static/js/openassessment-studio.min.js
Merge pull request #517 from edx/grady/styles

Incorporated UX styling feedback and imporoved cross browser experience