feat: add support to drag & drop captions with a keyboard for accessibility#36901

arthurgousset wants to merge 3 commits intoopenedx:masteropenedx/edx-platform:masterfrom

arthurgousset:workback/patch/36800/3f964737-f005-4cdc-a060-ad2bd5f2ea8earthurgousset/edx-platform:workback/patch/36800/3f964737-f005-4cdc-a060-ad2bd5f2ea8eCopy head branch name to clipboard