Automatic merge of T1.5.1-866-gbae4730e2 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 #908 at 4b4afe3: feat: supports switching adhesion precisions
- 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 5e3fe31: Adjustments to Duplex steam
- Pull request #915 at 6d911d7: Correct calculation error with curve friction

Author: openrails-bot

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs

@@ -1065,7 +1065,7 @@ public override void Update(float elapsedClockSeconds)
                  // BailOff
                 if (engineBrakeStatus == ControllerState.BailOff)
                 {
-                    AutoCylPressurePSI -= Math.Max(MaxReleaseRatePSIpS, loco.EngineBrakeReleaseRatePSIpS) * elapsedClockSeconds;
+                    AutoCylPressurePSI -= MaxReleaseRatePSIpS * elapsedClockSeconds;
                     if (AutoCylPressurePSI < 0) AutoCylPressurePSI = 0;
                 }
                 // Emergency application
@@ -1107,7 +1107,7 @@ public override void Update(float elapsedClockSeconds)
                                 }
                                 else
                                 {
-                                    AutoCylPressurePSI -= Math.Max(MaxReleaseRatePSIpS, loco.EngineBrakeReleaseRatePSIpS) * elapsedClockSeconds;
+                                    AutoCylPressurePSI -= MaxReleaseRatePSIpS * elapsedClockSeconds;
                                     if (AutoCylPressurePSI < 0)
                                         AutoCylPressurePSI = 0;
                                 }