nests form_id in every form on creation and duplication
form submitting without javascript with complex key for id
finishes upgrade to new form action and improves draggable in form editing

The form action is upgraded to the /results/[:id] when a form is created or copied, using a helper method in the form model.  Draggable was causing field elements to move wildly out of place when a field was deleted, so when a field is deleted a ghost box of the same dimensions is left in its place to keep fields from being rearranged automatically.