Made IsRemnant a NullEditor

prs.classes/Entities/Stock/StockHolding.cs

@@ -165,6 +165,7 @@ namespace Comal.Classes
         public override StockDimensions Dimensions { get; set; }
 
         [Condition(typeof(StockHoldingIsRemnantCondition))]
+        [NullEditor]
         public bool IsRemnant { get; set; }
         
         [Aggregate(typeof(StockHoldingUnitAggregate))]