* Rounding unit price - line discount before applying quantity
On some systems, the line total price is calculated based on the discount applied on the unit price first, giving a new rounded unit price, and then multiplied by the quantity. Whereas the current way Dolibarr acts is to apply the discount on the subtotal (unit price * quantity).
Using an extra OTHER SETUP constant 'MAIN_ROUND_UNIT_PRICE_BEFORE_QTY', we can choose between the two ways.
* Update price.lib.php
* Update price.lib.php
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Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>
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