## Addresses #11088
Updated solution:
https://www.loom.com/share/e3ca30bebde54df5b8cbd8cac6d26780
- First refresh displays the bug: a white bar at the top of the page as
the login page loads.
- Second refresh displays the login page with the bug gone
- Navigate at the end to an error page to confirm it is unaffected,
since the initial solution affected the background color of those pages
## Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/`
- [x] Manual QA for all new/changed functionality
---------
Co-authored-by: Jacob Shandling <jacob@fleetdm.com>
d5c9ae2baf