Automatic merge of T1.5.1-687-gd279e384a and 18 pull requests

- Pull request #570 at c59c788: 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 #865 at 67014b7: Dispatcher window improvements
- Pull request #874 at f8dbeab: Dynamic brake controller refactoring
- Pull request #875 at 43bf33e: Bug fix for https://bugs.launchpad.net/or/+bug/2036346 Player train switching doesn't work with 3D cabs
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #878 at 25f5e06: Implement Polach Adhesion
- Pull request #882 at d8a1c4d: Blueprint/train car operations UI window
- Pull request #883 at edcc2dd: SwitchPanel disconnect/connect handling
- Pull request #885 at c81447b: feat: Add notifications to Menu
- Pull request #886 at 8da48b3: Scene viewer extension to TrackViewer
- Pull request #887 at 4665bda: docs: Document projects, assemblies, namespaces
- Pull request #888 at d7daf62: docs: Document player application model
- Pull request #889 at 43341cf: No speed update
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #893 at bf8876b: Signal errors
- Pull request #894 at 794fddf: Correct Decrease Colour
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains

Author: openrails-bot

Source/Contrib/TrackViewer/SceneViewer.cs

@@ -277,7 +277,8 @@ void FillSelectedObjectData()
             SceneWindow.PosX.Text = SelectedObject?.Location.Location.X.ToString("N3", CultureInfo.InvariantCulture).Replace(",", "");
             SceneWindow.PosY.Text = SelectedObject?.Location.Location.Y.ToString("N3", CultureInfo.InvariantCulture).Replace(",", "");
             SceneWindow.PosZ.Text = SelectedObject?.Location.Location.Z.ToString("N3", CultureInfo.InvariantCulture).Replace(",", "");
-            if (SelectedObject?.Location.XNAMatrix.Decompose(out var _, out var q, out var _) ?? false)
+            var q = new Quaternion();
+            if (SelectedObject?.Location.XNAMatrix.Decompose(out var _, out q, out var _) ?? false)
             {
                 var mag = Math.Sqrt(q.W * q.W + q.Y * q.Y);
                 var w = q.W / mag;