Automatic merge of T1.5.1-870-ge0bf062eb and 16 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 #897 at 42f1dd9: feat: Improved system information collection
- Pull request #903 at 0d6d045: Downloading route content (Github, zip)
- Pull request #907 at 9b0b04f: Bug fix for https://bugs.launchpad.net/or/+bug/2047300 Dynamic tracks disappear after long tunnel
- Pull request #911 at 6834af0: docs: Add refactoring as a special type of PR
- Pull request #912 at 659396e: New Triple Valve Features Vol. 2
- Pull request #914 at 69a4ccc: Adjustments to Duplex steam
- Pull request #915 at 6d911d7: Correct calculation error with curve friction
- Pull request #916 at 11ac52c: Distributed Power Air Brake Synchronization

Author: openrails-bot

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/PowerTransmissions/Axle.cs

@@ -341,7 +341,7 @@ public void Update(float elapsedSeconds)
                 if (UsePolachAdhesion != PreviousUsePolachAdhesion) // There's been a transition
                 {
                     axle.AxleSpeedMpS = axle.TrainSpeedMpS; // So the transition doesn't cause a wheelslip
-            }
+                }
                 axle.Update(elapsedSeconds);
             }
             PreviousUsePolachAdhesion = UsePolachAdhesion;
@@ -367,7 +367,7 @@ enum AdhesionPrecisionLevel
                 /// After frequent transitions, low-performance PCs are locked to Pacha's algorithm
                 /// </summary>
                 LowLocked = 2
-    }
+            }
 
             // Adjustable limits
             const float LowerLimitS = 0.025f;   // timespan 0.025 = 40 fps screen rate, low timeSpan and high FPS