Add weight limit to scale

Elwig/App.xaml.cs

@@ -47,8 +47,9 @@ namespace Elwig {
                     var cnx = s[3];
                     var empty = s[4];
                     var filling = s[5];
+                    int? limit = s[6] == null ? null : int.Parse(s[6]);
                     if (type == "systec") {
-                        list.AddLast(new SystecScale(scaleNr, model, cnx, empty, filling));
+                        list.AddLast(new SystecScale(scaleNr, model, cnx, empty, filling, limit));
                     }
                 } catch (Exception e) {
                     MessageBox.Show($"Unable to create scale {s[0]}:\n\n{e.Message}", "Scale Error", MessageBoxButton.OK, MessageBoxImage.Error);