I have multiple areas of work that I want to do each sprint. The Themes model works well here; I have assigned a Theme to all my stories and I can check how much of each Theme I'm working on each sprint with the Themes report. But the backlog/Scope view in Portfolio gets pretty unmanageable for rank prioritization; there's no way to only consider one Theme at a time and sort those items. Is there a better way to make a plan that merges all Themes together, but lets me sort items in a single Theme better? I think a Theme filter in the Scope view would do this well, but I also wonder if there's a better workflow in general.