Added the possibility to split the warehouse shipments per shipment date

Now, if you have different shipment date on the document lines, you can create a whse shipment per shipment line.

The first thing that is required is that the sales document has a Whse. Shipment Code:

Then, on the Whse. Shipment Code, the new option "Create Whse Shpt. per Shipment Date" needs to be activated:

Once the setup is made, then the shipments are created per Shipment date:

The same works now in Purchase if the Whse Receipt Code is set correspondingly: