Edit function that allows you to revisit all sections of Create a Roundup

Ideally, we should be able to change all specifications in the Create a Roundup from Source through Headline without losing the work that was done previously. Currently, if you edit a finished roundup, you can only change the order of the products and change specific text. It would be great if you could regenerate the roundup by adding a product or a product category or even changing the style once the roundup has gone through a first draft.