<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#35322
# Details
Since the end-user auth form uses calls its own API rather than the
common config update handler in the parent `IntegrationsPage`, we need
to notify that parent when updates occur so that it can re-fetch the app
config which serves as the base state for all of the sub-sections.
# Checklist for submitter
## Testing
- [ ] Added/updated automated tests
- [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