Clicking inside popovers causes them to close

Created by: attfarhan

• Sourcegraph version: "Sourcegraph.com"
• Platform information:

Steps to reproduce:

1. Open any popover (e.g. extension debug popover, repo popover on a repo page)
2. Click inside, notice they'll close

@lguychard perhaps this is due to merging https://github.com/sourcegraph/sourcegraph/commit/7d79756a3fcb7e3e9693c7260eb0fc4c35ab8b78?