allow the issue form submit to keep status even when JS is not enabled (BB-2348)

Because of other junk hosted on cloudfront I had blocked javascript from that domain.

As a consequence of that I unintentionally changed the status on https://bitbucket.org/tortoisehg/thg/issue/869/tortoisehg-nautilus-doesnt-work-at-all#comment-606881 .

The site generally works fine without javascript, but the existing status value do apparently not have the right default value in the html but depends on javascript. Please fix that so you have full graceful degradation.