Feature Request: Add a query string

[bezirg]

For convenience I like to have custom web-browser search engines, e.g. a search engine named "hoogle" that queries this url https://hoogle.haskell.org/?hoogle=%s .

I don't think I can achieve the same thing for errors.haskell.org.

Idea: The "type here to filter" input box also updates the URL query string

[Bodigrim]

PRs are welcome.