Provide a mechanism to preview multi-page forms

[dkapell]

@jducoeur says: Ace and I are working up a proposal, so they went to copy the proposal questions out to our wiki, so we can beat them up together before submitting. They pointed out to me that, to get the full list of questions, you need to start the proposal process and enter dummy data. That's a little unfortunate -- we're surely not unusual in wanting to collaborate on the questions in advance. Might be worth a page that just lists all of the questions, for this purpose?

@dkapell suggests: I think what you really want is "provide a built-in mechanism to display all pages of a multi-form layout, powered from the form builder" or "provide a mechanism to step through a multi-page form"