Added job link to bill line

prs.classes/Entities/Bill/BillLine.cs

@@ -51,6 +51,9 @@ namespace Comal.Classes
         [EditorSequence(7)]
         public double IncTax { get; set; }
 
+        [EditorSequence(8)]
+        public JobLink Job { get; set; }
+
         [NullEditor]
         public string PostedReference { get; set; }
 
@@ -96,6 +99,7 @@ namespace Comal.Classes
 
         private static readonly Column<BillLine> OrderItemColumn = new Column<BillLine>(x => x.OrderItem.ID);
         private static readonly Column<BillLine> ProductColumn = new Column<BillLine>(x => x.Product.ID);
+        private static readonly Column<BillLine> JobColumn = new Column<BillLine>(x => x.Job.ID);
 
         protected override void DoPropertyChanged(string name, object? before, object? after)
         {
@@ -104,8 +108,11 @@ namespace Comal.Classes
             {
                 Product.ID = Guid.Empty;
                 Product.Clear();
+                Job.ID = Guid.Empty;
+                Job.Clear();
             }
-            else if(ProductColumn.IsEqualTo(name) && after is Guid productID && productID != Guid.Empty)
+            else if((ProductColumn.IsEqualTo(name) && after is Guid productID && productID != Guid.Empty)
+                || (JobColumn.IsEqualTo(name) && after is Guid jobID && jobID != Guid.Empty))
             {
                 OrderItem.ID = Guid.Empty;
                 OrderItem.Clear();