Enable @arturi's Object URL preview thumbnail code
Enable @arturi's Object URL preview thumbnail code

I can't see any downsides here personally, `createObjectURL` has
wide support (IE10+) and is significantly faster. Without this,
on every state update the browser needs to re-parse the base64
encoded preview, which can lag the Uppy UI to a crawl.

varung-optimus/uppy,varung-optimus/uppy,transloadit/uppy,transloadit/uppy,varung-optimus/uppy,transloadit/uppy,transloadit/uppy