hidden fields figured out

Bid review now uses a hidden field for evaluator and bid - the user
should never have to pick these things, they are implied by form usage.

Having thus figured out hidden fields, I also fixed a few more profile
bugs - the hidden field is now hidden, and the edit function overwrites
the persona object as intended.

Lastly - cleaned up some bugs in form display so that the HTML is
rendered properly and two CSRF tokens are not added to the same form
(which seemed like a bug landmine waiting to explode)