Fixed bug that caused an error when releasing purchase orders because a vendor shipment number couldnt be adjusted properly

A new field "Release Whse. Doc. after Creation" was added on both Whse. Shipment Codes and Whse. Receipt Codes pages.

In combination with "Cr. Whse. Shpt. Doc. on Rel." and "Cr. Whse. Rcpt. Doc. on Rel.", this field controls whether the automatically created Whse. Shipment or Whse. Receipt should be directly released.