* Closes #169 break down by cohort
* Fix test
* Prettier breakdown filters
* Rerender each time it's opened
* Fix tests
* Add 'all users' option in breakdown
* Make people work with cohorts
* Precalculate cohorts
* Return last_calculation
* Show precalculation in the frontend
* Closes #675 fix icon alignment
* Frontend fixes, antd and more
* Make sure unsetting breakdown doesn't break things
* Semantic name for migration
* Separate data migration + cohort key bugfix
* Correctly filter people by event
* Typing
* add warning script to settings and docker-worker in case REDIS_URL is not found
* test celery heartbeat
* save celery heartbeat in redis
* /_stats/ with worker heartbeat
* refactor top content
* show worker stats
* heartbeat delay to 90sec
* update worker error message
* remove line
* add redbeat schdeduler
* add redbeat for local development