Fix an issue with mapper's use of new paginator.

Before paginator.paginate needed a _ to get a
NodeSeq=>NodeSeq; that is no longer necessary.
Remove FormProcessor.

There doesn’t seem to be any documentation describing
how to truly use it, and it was introduced as an
“experimental” feature. If folks ask for it back, we can
restore it after inquiring as to how they’re using it.
Replace ModelView BindParams etc with CssSels.
Remove bind from TableEditor/Util in mapper.view.