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Automatically update order totals when editing an order (configurable)
Automatically update order totals when editing an order in admin area (editing, deleting products, etc).
But as we may have quite complex discount rules and tax rules which could be changed since an order was placed, then we should allow a store owner to choose whether order totals should be also updated (make this option configurable)
It is really VERY complex to tackle it since it has to consider the products and their atributes and their inventory, weight, attributes and thier price/weight adjustments; regular, old and tiered prices, special prices and discount and tax rules (all which
change from time to time); shipping expenses etc. etc.
In my experience it is very uncommon. If you have inventory control (which is very important for certain kinds of products which have limited availavility, such as clothes, shoes, etc.) then changes are rare. The number of votes and requests for that are indicative
that there is not much demand for it.