Add conveyor belt and augers

PamhagenSysCtrl/Windows/PlantSchemeWindow.xaml.cs

@@ -61,6 +61,10 @@ namespace PamhagenSysCtrl.Windows {
                     trough.IsActive = !trough.IsActive;
                 } else if (c is Rebler rebler) {
                     rebler.IsActive = !rebler.IsActive;
+                } else if (c is EncasedAuger auger) {
+                    auger.IsActive = !auger.IsActive;
+                } else if (c is ConveyorBelt belt) {
+                    belt.IsActive = !belt.IsActive;
                 }
             }
             UpdateScheme(pos, evt.LeftButton == MouseButtonState.Pressed);