for #32238
# Details
* After a script is canceled, refresh the current tab to show that the
canceled script is no longer there
* When scheduling a script, check the specified time against UTC, not
current timezone time of day.
# Checklist for submitter
## Testing
- [X] QA'd all new/changed functionality manually
For unreleased bug fixes in a release candidate, one of:
- [X] Confirmed that the fix is not expected to adversely impact load
test results