Automatic merge of T1.5.1-569-g8f17be306 and 14 pull requests

- Pull request #757 at 98dd1a7: Unify RailDriver code implementations
- Pull request #831 at 594df54: poor mans switch panel on tablet
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #841 at 410a585: https://blueprints.launchpad.net/or/+spec/animating-trainset-windows
- Pull request #853 at d05f581: Notify out of focus
- Pull request #855 at b39e5d8: Adds new route from TrainSimulations
- Pull request #857 at 9afc8c3: Adding Air Flow Meters
- Pull request #863 at a34b857: Alternate preset 3D cabviewpoints
- Pull request #864 at e71bc5a: Fixes for Undesired Emergency Applications
- Pull request #865 at 776d6df: Dispatcher window improvements
- Pull request #866 at c15333e: Fix Articulation For 0-Axle Train Cars
- Pull request #870 at 5cb32fa: Fix water restore
- Pull request #871 at c2388e6: Signal aspects are multiplied when reopening Dispatcher Window
- Pull request #872 at 00c5b8b: Fix Retainer State Disappearing from HUD on Restore

Author: openrails-bot

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

@@ -331,6 +331,7 @@ public override void Save(BinaryWriter outf)
             outf.Write(HandbrakePercent);
             outf.Write(ReleaseRatePSIpS);
             outf.Write(RetainerPressureThresholdPSI);
+            outf.Write(RetainerDebugState);
             outf.Write(AutoCylPressurePSI);
             outf.Write(CylPressurePSI);
             outf.Write(AuxResPressurePSI);
@@ -358,6 +359,7 @@ public override void Restore(BinaryReader inf)
             HandbrakePercent = inf.ReadSingle();
             ReleaseRatePSIpS = inf.ReadSingle();
             RetainerPressureThresholdPSI = inf.ReadSingle();
+            RetainerDebugState = inf.ReadString();
             AutoCylPressurePSI = inf.ReadSingle();
             CylPressurePSI = inf.ReadSingle();
             AuxResPressurePSI = inf.ReadSingle();