Changes deployed to amara.org:
- #742 Switch test_factories to factoryboy
- #851 Approval tasks left unassigned after sending back to reviewer and re-accepting
- #1322 Allow admins to batch approve approval tasks
- #1323 Allow team admins to batch move videos from 1 team to another
- #1411 Make Uyghur an RTL language status 4 merged-to-staging type: bite-sized
- #1448 Updated _upload_subtitles.html template for webVTT
- #1458 Do not bulk copy incomplete subtitles
- #1459 Queries optimizations
- #1461 Refactor sending notifications when sending bulk messages
- #1466 Limit primary audio filter for moving videos to tedxtalks-import
