Use self-hosted URL for omnibox "src" + fallback to cloud URL if empty
Created by: erzhtor
Closes https://github.com/sourcegraph/sourcegraph/issues/26243.
Testing
- Run browser extension locally (
yarn --cwd client/browser dev
) - Add self-hosted instance and use
src
omnibox command. It should search in self-hosted - Remove self-hosted instance and use
src
command. It should search in the cloud.