Introduce checks if prices still comply with actual price list
As inflation is rising, delivery chains become less reliable - and not to forget: people tend to make mistakes - it would be helpful if Tryton would check if price list prices still are the same as in a sale - and alert the user if not.
At least, this should happen when an invoice is about to be posted. We may think whether it makes sense before packing items (which may be delayed e.g.)
As this feature may be annoying to some people, user should be able to switch it off.