I can edit a List's content nicely, in-page

Summary: This is a bit speculative, but borderline necessary for managing Features. I need to be able to render the list of the Feature's Stories, in Summary Display format; rearrange the list in that format; have an easy way to edit a given Story in that list; and have an easy way to add another Story to that list.

The generalized concept here seems to be variant of Pick List. Ideally, there should also be a concept of the candidate list that is being drawn from -- that would be the "Also referred to in" list that comes after the sorted list. In the long run, that would allow us to have a larger pool of stories, with just the crucial ones in the prioritized list. Also ideally, I should be able to just drag something out of that pool into the sorted list -- the sorted list is explicitly a view into the larger pool.

Later: I'm currently thinking of this as part of the "_editable" function. If you say _editable on a Collection, it makes it Sortable right there (if it's a List), and shows an in-place Edit button over each element when you hover over it, if that element can be directly related to an element in a Property.