Fix incorrect video bok choy test.
Merge pull request #4083 from edx/alex/fix_syntax_error_in_video_player_test

Fix incorrect video bok choy test.
Early draft of the new dashboard page.
Show a loading indicator while loading dashboard.
breadcrumb pattern - used on new dashboard
Add breadcrumbs and handling of display names
Add usage counts to the dashboard home
Many small improvements

 - Fixed edit and delete buttons
 - Improved styling
 - Only show components that can be added to the course
 - Added "Publishing Status" column