Priority Buttons/Auto-Update for Trade Office Panel

Currently, the Trade Office Panel requires users to remove an offer and start over with the trade options, if a slot of higher priority is emptied...

It would be great if there were buttons to shift the priority of a selected lot to higher/lower slots, or have an auto-update feature that recognises when a player has removed an unclaimed trade in-between two slots; i.e. moving the lower lot upwards whilst reimbursing the difference in coins/gems.