Changed the inventory adjustment process (Used by the manual adjustment screen, as well as the Adjustment import, and any derivative imports). This process no longer records "pending adjustments" in the case that an adjustment is impossible due to a lack of quantity-on-hand to subtract from. Instead the process will automatically attempt to back order the most recent orders until the adjustment can be made. If still unsuccessful, as in the case where items are already shipped, the adjustment amount may be reduced to the maximum possible amount.