Changes in Cart Discounts StackingMode StopAfterThisDiscount Behavior

Based on customer feedback we changed the behavior of the StackingMode StopAfterThisDiscount.

• [API] The StackingMode StopAfterThisDiscount now continues with further discounts if the discount could not be applied because the CartDiscountTarget did not match. Previously, the application of further discounts was stopped even if the target condition was not fulfilled.