Removed spacebar event handler, because it did more harm than good.
Move edit info into xblock and runtime mixins
LMS-11183, LMS-11184
Implement edit info as mixin for split
LMS-11183, LMS-11184
Change published_date to published_on
to make consistent with other edit info timestamps
LMS-11184
Move tests into appropriate directory structure.
Implement edit info as mixin on base mongo
LMS-11183, LMS-11184
Merge pull request #5001 from edx/split/edit_info

Split/edit info
LMS-11332 Unit test
Add specific bulk-operation test for LMS-11332, and a fix
Merge pull request #5043 from edx/christina/cohort-selector

Move tests into appropriate directory structure.
Merge pull request #5014 from edx/dcs/BLD-1189

Removed spacebar event handler, because it did more harm than good.
Merge pull request #5052 from edx/split/bulk-rerun-LMS-11332

Enable bulk operations on split
Add video link transience for S3 hosted videos.