Update cost price of customer moves when supplier unit price is changed of drop shipment
The cost price of customer move of drop shipment is synchronized with the unit price of the supplier move of the same drop shipment.
But since #9962 (closed) the unit price of the supplier move can be updated later so we must recompute the cost price of the customer moves.
I propose to do that in the recompute_cost_price
like that we can use the unit_price_updated
field as trigger.