Automatic merge of T1.5.1-261-g5072d724b and 7 pull requests

- Pull request #722 at fb9079e: Fix Windows Forms deprecations in ActivityEditor
- Pull request #732 at 83002d7: Improvements for air brakes
- Pull request #751 at f947f29: Web interface to control cab controls with external hardware
- Pull request #753 at ab8fe32: Extends CabControls for user input
- Pull request #766 at c9657de: Control Car additional functionality
- Pull request #767 at 9317f8c: Refine sunrise and sunset
- Pull request #769 at 1a99f43: Partial turntables https://blueprints.launchpad.net/or/+spec/partial-turntable

Source/RunActivity/Viewer3D/WebServices/WebServer.cs

@@ -90,7 +90,7 @@ await text.WriteAsync(JsonConvert.SerializeObject(data, new JsonSerializerSettin
                 }));
             }
         }
-        
+
         public static async Task<T> DeserializationCallback<T>(IHttpContext context)
         {
             using (var text = context.OpenRequestText())