Automatic merge of T1.6-rc6-37-g6dd094783 and 12 pull requests

- Pull request #1086 at e10390b: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1104 at 86d38a2: Handle simple adhesion within the axle module
- Pull request #1115 at 270f22f: Do not activate ETS switch if no suitable cars are attached
- Pull request #1120 at ba3c47f: Automatically Calculate Friction Values if Missing
- Pull request #1121 at 91d2d26: Manually Override Articulation
- Pull request #1130 at 8ae6bb7: Fix F9 points to an incorrect car ID.
- Pull request #1139 at 03c6f8f: Fix for bug https://bugs.launchpad.net/or/+bug/2117357. 
- Pull request #1142 at a24747c: Fix light position calculation for deeper hierarchy levels
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #1081 at 689494b: Brake cuts power unification
- Pull request #1124 at fab5457: Built-in PBL2 brake controller
- Pull request #1128 at 58de4c3: Particle Emitter Overhaul

Author: openrails-bot

Source/RunActivity/Viewer3D/WebServices/TrainCarOperationsWebpage.cs

@@ -31,8 +31,6 @@
 using Orts.Simulation.RollingStocks.SubSystems.Brakes.MSTS;
 using ORTS.Scripting.Api;
 using System.IO;
-using Orts.Simulation.Physics;
-using Orts.Simulation.RollingStocks.SubSystems.Brakes;
 
 namespace Orts.Viewer3D.WebServices
 {
@@ -711,10 +709,7 @@ public void buttonCouplerFrontClick(int carPosition)
                 TrainCarViewer.NewCarPosition = carPosition - 1;
                 if (Viewer.CarOperationsWindow.CarPosition > carPosition - 1)
                     Viewer.CarOperationsWindow.Visible = false;
-                if (Viewer.TrainCarOperationsWindow.SelectedCarPosition >= Viewer.PlayerTrain.Cars.Count())
-                {
-                    Viewer.TrainCarOperationsWindow.SelectedCarPosition = Viewer.PlayerTrain.Cars.Count - 1;
-                }
+                Viewer.TrainCarOperationsWindow.SelectedCarPosition = 0;
             }
         }
 
@@ -814,10 +809,7 @@ public void buttonCouplerRearClick(int carPosition)
                 TrainCarViewer.CouplerChanged = TrainCar.CouplerClicked = true;
                 if (Viewer.CarOperationsWindow.CarPosition > carPosition)
                     Viewer.CarOperationsWindow.Visible = false;
-                if (Viewer.TrainCarOperationsWindow.SelectedCarPosition >= Viewer.PlayerTrain.Cars.Count())
-                {
-                    Viewer.TrainCarOperationsWindow.SelectedCarPosition = Viewer.PlayerTrain.Cars.Count - 1;
-                }
+                Viewer.TrainCarOperationsWindow.SelectedCarPosition = 0;
             }
         }