Purchase Order Item Tax Amounts are now editable

Fixed Issuewith blank images

prs.classes/Entities/PurchaseOrder/PurchaseOrderItem.cs

@@ -164,7 +164,7 @@ namespace Comal.Classes
         public double TaxRate { get; set; }
 
         [EditorSequence(12)]
-        [CurrencyEditor(Visible = Visible.Default, Editable = Editable.Hidden, Summary = Summary.Sum)]
+        [CurrencyEditor(Visible = Visible.Default, Summary = Summary.Sum)]
         public double Tax { get; set; }
 
         [EditorSequence(13)]

prs.desktop/Utils/PostUtils.cs

@@ -113,10 +113,8 @@ namespace PRSDesktop
                 {
                     var icon = new Client<Document>()
                         .Load(new Filter<Document>(x => x.ID).IsEqualTo(postSettings.Thumbnail.ID)).FirstOrDefault();
-                    if (icon is not null)
-                    {
+                    if (icon?.Data?.Any() == true)
                         image = new ImageConverter().ConvertFrom(icon.Data) as Bitmap;
-                    }
                 }
                 host.CreatePanelAction(new PanelAction
                 {