React UI: Simpler and relative-only query URL building (#6263)
React UI: Simpler and relative-only query URL building (#6263)

I prefer just keeping it dumb (and it helps with a current Netlify
deploy hack I have).

Signed-off-by: Julius Volz <d7748b1e6f41fd74500c5ccae0980eab88c2ef61@gmail.com>
GoogleCloudPlatform/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,alileza/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,prometheus/prometheus,prometheus/prometheus,kangwoo/prometheus,prometheus/prometheus,prometheus/prometheus,alileza/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,kangwoo/prometheus,kangwoo/prometheus,keegancsmith/prometheus,kangwoo/prometheus,Gouthamve/prometheus,Gouthamve/prometheus