CORS issues can be a pain to debug because any error (400, 404, 500, etc) during an OPTIONS request manifests as GTFO in the browser if that OPTIONS request happens to be a CORS pre-flight check.
The dashboard should simplify debugging CORS issues by allowing OPTIONS requests when CORS is enabled. This way you can simulate browser OPTIONS requests and see what's being returned (rather than the GTFO results from the browser) that may be breaking it.
Resolve #281 - Allow running OPTIONS requests in dashboard to debug C…
Relates to #259 #281