Sort and filter by notes + on purchase order

If we could sort products by whether they are on purchase orders or not would be helpful as we could have a side by side comparison without filtering all items that are not on purchase orders. For product notes, it would be helpful to be able to filter or sort by which items have product notes attached. Being able to move these items to the bottom of the list of products, or the top would help us find groups of products with the same product notes easier.