Improve submission process

[SteveALee]

Currently we do a simple client redirect on form submission. This loses the ability to pass data back from server (unless use cookies) which would let client side response could be more informative

provide a link to the new PR

If we can get the number from github - maybe if we use API to create? Change from redirct to custom form posting and handle response client side

Add a preview of the form contents

• Could use the existing list format
• need client side reproduction of SSG template