Subgrid with Re-ordering of Child Records

I imagine this would only work for 1:N relationships with a whole number column on which the selected View is sorted on. The grid would allow either drag and drop re-ordering (or at least up/down arrows on each row) that re-orders the records via updating the whole number field.

In my case we are building out some data (legal Clauses) to insert into documents and the order of insertion matters. I'd build it myself but at this time at least the Project doesn't have budget for me to learn how to build a custom control and build/test it.