FEATURE: Support For Earning Pts When Paying With Pts

Added support for earnpointswhenpayingwithpoints. Formula being used to calculate points earned is now: ((Subtotal - ExcludedProductExtendedTotal - (RewardPointsPaymentTotal - ShippingAndAdditionalFeesCartPercentage - ExcludedProductCartPercentage)) x PointsEarnedPerDollarSpent) + BonusPointsTotal Text in red is 0 unless the setting is turned off.