Automatic merge of T1.5.1-905-gaf8fb30c5 and 13 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 #916 at 4006f8a: Distributed Power Air Brake Synchronization
- 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/Orts.Simulation/Simulation/RollingStocks/MSTSLocomotive.cs

@@ -2786,7 +2786,7 @@ protected virtual void UpdateCompressor(float elapsedClockSeconds)
                     foreach (TrainCar locoCar in locoGroup)
                     {
                         if (locoCar is MSTSLocomotive loco)
-                            syncCompressor |= (locoGroup.Contains(this as TrainCar) || CompressorIsMUControlled && loco.CompressorIsMUControlled)
+                            syncCompressor |= (locoGroup.Contains(this as TrainCar) || (CompressorIsMUControlled && loco.CompressorIsMUControlled))
                                 && loco.CompressorIsOn && loco.MainResPressurePSI < loco.MaxMainResPressurePSI;
 
                         // No need to check repeatedly if we already know to sync compressors

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

@@ -1263,9 +1263,9 @@ protected static void PropagateBrakeLinePressures(float elapsedClockSeconds, Tra
                         {
                             // Only sync application/release on DP units if both the lead unit AND the DP lead unit are set to synchronize
                             // Lead locomotive will always be allowed to apply/release
-                            bool syncApplication = loco == lead || loco.DPSyncTrainApplication && lead.DPSyncTrainApplication;
-                            bool syncRelease = loco == lead || loco.DPSyncTrainRelease && lead.DPSyncTrainRelease;
-                            bool syncEmergency = loco == lead || loco.DPSyncEmergency && lead.DPSyncEmergency;
+                            bool syncApplication = loco == lead || (loco.DPSyncTrainApplication && lead.DPSyncTrainApplication);
+                            bool syncRelease = loco == lead || (loco.DPSyncTrainRelease && lead.DPSyncTrainRelease);
+                            bool syncEmergency = loco == lead || (loco.DPSyncEmergency && lead.DPSyncEmergency);
 
                         tempBrakePipeFlow = 0.0f;