Author filter shows "No matching authors found" when there is one

Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Go to the Author filter on the PR list page
2. Copy “eli salter” and paste it directly into the filter input field.

Expected Results

No warning message

Actual Results

...

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available