Better Empty Challenge

When a new challenge is created, the default School ID should be set to `999`
instead of `0` to create a better experience with the displays should the user
not actually enter their picks.
Merge branch 'feature/better-empty-challenge' into develop
Show other users' picks only when the challenge is not active.
Reminders will now be sent in Production. Fixed bug with checking environment.
Merge branch 'feature/fix-reminders' into develop
Across all pages, others picks are not shown while the challenge is active
Merge branch 'feature/hide-user-picks' into develop
Bump to version 2.10.0
Release v2.10.0