Automatic merge of T1.5.1-899-gf9d64a4dc and 14 pull requests

- Pull request #570 at 3539862: Experimental glTF 2.0 support with PBR lighting
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #882 at 9c456aa: Blueprint/train car operations UI window
- Pull request #885 at 8f94333: feat: Add notifications to Menu
- Pull request #886 at 6c0785b: Scene viewer extension to TrackViewer
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #903 at 9bead33: Downloading route content (Github, zip)
- Pull request #911 at 6834af0: docs: Add refactoring as a special type of PR
- Pull request #912 at d595703: New Triple Valve Features Vol. 2
- Pull request #917 at 644844a: Lighting Configuration Enhancements
- Pull request #919 at 7aafe02: Added mouse wheel support for controls which can be moved by pressing t…
- Pull request #920 at a94e403: Update RailDriver in Manual

Author: openrails-bot

Source/RunActivity/Viewer3D/Lights.cs

@@ -112,9 +112,11 @@ public LightViewer(Viewer viewer, TrainCar car, TrainCarViewer carViewer)
                     if (light.ShapeIndex != -1)
                     {
                         if (light.ShapeIndex < 0 || light.ShapeIndex >= (CarViewer as MSTSWagonViewer).TrainCarShape.XNAMatrices.Count())
+                        {
                             Trace.TraceWarning("Light in car {0} has invalid shape index defined, shape index {1} does not exist",
                                 (Car as MSTSWagon).WagFilePath, light.ShapeIndex);
-                        light.ShapeIndex = 0;
+                            light.ShapeIndex = 0;
+                        }
                     }
                     else
                     {