Add support for non expiring schedules

- by default, remove all schedules
- but of you click this button then this behavior will not happen
3 jobs for 68-non-expiring in 2 minutes and 25 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #3743
whats-open-py2.7

00:01:54

passed #3744
whats-open-py3.5

00:01:55

passed #3745
whats-open-py3.6

00:01:53