Directory name in file tree still highlighted after navigating back to root of repository

Created by: mrnugget

1. Open a folder on Sourcegraph: https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/tree/dev
2. Click on the repository name in the top left
3. Folder name is still highlighted

Video:

https://user-images.githubusercontent.com/1185253/110104016-eb42d180-7da6-11eb-8413-57637abc7f62.mp4