Added the field Special Order Purchase No. in the sales order subpage and sales order overview

Purchase Order no in Sales Line:

in the sales order subpage and the sales overview the field Purchase Order No. is added. This field is filled if we have a special order no or dropshipment order no filled in the sales line. 

If the purchase order no is clicked on the purchase order no is opened. In this case the sales person doesn't have to compare two different fields to have a look if the needed purchase order is created.