Ability to cancel / undo an order

[TrixabelleCP]

I wish to be able to cancel/undo an order. ie undo the effects of a specific order.

Without this functionality we must create an order that puts the subscription back into the state it was before the order occured but this is potentially very error prone as the person doing this needs to work out exactly what has changed.

There is a "delete order" function but that is only for undoing clerical errors not customer changes.

(note - we are using Orders rather than amendments).