JSON blob api POST request seems to be Broken

[stripathix]

It used to be x-jsonblob header which has a path of JSON blob that is created.

But looks like it is changed to location response header. But in JS due to CORS it is not possible to read this header.

Ref: https://stackoverflow.com/questions/43344819/reading-response-headers-with-fetch-api

Bug Fiddle https://jsfiddle.net/62L35b8z/

Maybe need to expose this header to allow the client to read its value.

[tburch]

@stripathix I'll deploy this fix tonight. I missed this in the rewrite.