Automatic merge of T1.5.1-1608-g273f2ef97 and 12 pull requests

- Pull request #900 at b54024b: DMI in 3D cab + two more dials
- Pull request #1030 at d3ae4a2: Refactor settings, in prep for settings exporter
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #961 at ffccb2e: Improvements for Power Supplies
- Pull request #1015 at 1ade99e: Enhancements for EP brakes
- Pull request #1029 at 31fd7d2: Superelevation Follow Up Fixes
- Pull request #1031 at c097fd2: Multiplayer Server, forked from Open Rails Ultimate; blueprint https://blueprints.launchpad.net/or/+spec/multiplayer-server
- Pull request #1047 at eb8027b: Docs: adds translation docs
- Pull request #1058 at 626ebed: Refactor notification parameters
- Pull request #1059 at 313f795: Fix F9 powersupply crashes
- Pull request #1055 at 1a01818: Route Based TTrack Sounds
- Pull request #896 at f1681df: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains

Author: openrails-bot

Source/RunActivity/Viewer3D/Popups/TrainCarOperationsWindow.cs

@@ -690,13 +690,14 @@ public override void PrepareFrame(ElapsedTime elapsedTime, bool updateFull)
                 // Updates power supply status
                 else if (SelectedCarPosition <= CarPositionVisible && SelectedCarPosition == CarPosition)
                 {
-                    var powerSupplyStatusChanged = PowerSupplyStatus != null && PowerSupplyStatus != Owner.Viewer.PlayerTrain.Cars[CarPosition].GetStatus();
-                    var batteyStatusChanged = BatteryStatus != null && BatteryStatus != Owner.Viewer.PlayerTrain.Cars[CarPosition].GetStatus();
-                    var circuitBreakerStateChanged = CircuitBreakerState != null && CircuitBreakerState != (Owner.Viewer.PlayerTrain.Cars[CarPosition] as MSTSElectricLocomotive).ElectricPowerSupply.CircuitBreaker.State.ToString();
+                    var carposition = Owner.Viewer.PlayerTrain.Cars.Count > CarPosition ? CarPosition : CarPosition - 1;
+                    var powerSupplyStatusChanged = PowerSupplyStatus != null && PowerSupplyStatus != Owner.Viewer.PlayerTrain.Cars[carposition].GetStatus();
+                    var batteyStatusChanged = BatteryStatus != null && BatteryStatus != Owner.Viewer.PlayerTrain.Cars[carposition].GetStatus();
+                    var circuitBreakerStateChanged = CircuitBreakerState != null && CircuitBreakerState != (Owner.Viewer.PlayerTrain.Cars[carposition] as MSTSElectricLocomotive).ElectricPowerSupply.CircuitBreaker.State.ToString();
 
                     if (powerSupplyStatusChanged || batteyStatusChanged || circuitBreakerStateChanged)
                     {
-                        var Status = Owner.Viewer.PlayerTrain.Cars[CarPosition].GetStatus();
+                        var Status = Owner.Viewer.PlayerTrain.Cars[carposition].GetStatus();
                         if (Status != null && Status != PowerSupplyStatus)
                         {
                             PowerSupplyStatus = Status;