Cannot close "get started" hovercard on homepage

Created by: LinqLover

• Sourcegraph version: Sourcegraph.com
• Platform information: Google Chrome 94.0.4606.81

Steps to reproduce:

1. Go to <sourcegraph.com/search> (do not log in)
2. Press the X on this hovercard:

Expected behavior:

The hovercard is closed.

Actual behavior:

It remains open.