delete or delete all UOM or be able to move an older one to the lowest position

This will alleviates numerous UOM for a product every time a bid goes out and the vendor changes the pack size or you need to change the pack size for an existing product. Trying to change a UOM so you don't get the message it already exist and you can't get it to the lowest unit of measure without making many changes. See attachement for item 1083.