Search bar no longer updating to show current repo with smartSearchField turned on

Created by: dadlerj

• Sourcegraph version: 3.13.1

With the new smartSearchField experimental feature turned on, the search bar behaves differently when you visit a repo.

Steps to reproduce:

1. Visit Sourcegraph.com
2. With smartSearchField set to true:
   1. Search for "test"
   2. Click on any result
   3. Note that the search bar still just says "test"
3. With smartSearchField set to false:
   1. Search for "test"
   2. Click on any result
   3. Note that the search bar now shows the current repo:<REPO> filter applied

With smartSearchField:

Without smartSearchField: