web: Home page layout is broken on some

Created by: philipp-spiess

• Sourcegraph version: main branch
• Platform information: dev env

Steps to reproduce:

1. Create a new on-prem setup
2. Add a saved search to the panel on the home page

Expected behavior:

The width of the home page content does not change.

Actual behavior:

The home page content is compressed

https://user-images.githubusercontent.com/458591/154979793-33fa8bbe-7c26-4b99-a7c6-caf8428d83c8.mov