Fix missing import in arbitrary user list module
Merge pull request #1511 from learning-unlimited/fix-missing-import

Fix missing import in arbitrary user list module
Require admin/onsite to print schedules for other users
Remove some dead code from schedule generation

A bunch of stuff that was no longer necessary, and a ~duplicate method of the
same name in another module.
Add histograms directory to gitignore
Merge pull request #1513 from learning-unlimited/onsite-security-fix

Onsite fix
Merge pull request #1514 from learning-unlimited/gitignore

Add histograms directory to gitignore
Merge branch 'main' into mit-prod