only mark fields with missing account as error if required, re-add selected field for checkboxes in file list, make automatic price calculation configurable

MultiTool.Common/Documents/Document.vb

@@ -21,9 +21,14 @@ Namespace Documents
 
         Public Property Imported As Boolean = False
 
+        ''' <summary>
+        ''' This is used for saving the selected state via checkbox, don't remove!
+        ''' </summary>
+        Public Property Selected As Boolean = False
+
         Public ReadOnly Property HasErrors As Boolean
             Get
-                Return Mandator Is Nothing Or Rows.Any(Function(r As DocumentRow) r.HasErrors)
+                Return Errors.Count > 0
             End Get
         End Property