Automatic merge of T1.6-rc4-34-g041d7ab18 and 17 pull requests

- Pull request #1086 at e10390b: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1091 at aa72c13: Automatic speed control
- Pull request #1104 at 86d38a2: Handle simple adhesion within the axle module
- Pull request #1110 at 387388e: Fix Activity Runner persists after loading exception
- 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 abe7c8a: Fix F9 points to an incorrect car ID.
- Pull request #1132 at 934d29e: Fixes For Correct Questionable Braking Parameters
- Pull request #1133 at 8dc00d5: Minor Fix for Brake Pipe Charging
- Pull request #1136 at 6f1b82f: Fix Curve Resistance Calculation
- Pull request #1137 at c2c9e2a: Apply brakes at startup on minimal reduction
- Pull request #1139 at b47224d: Fix for bug https://bugs.launchpad.net/or/+bug/2117357. 
- 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

@@ -711,6 +711,10 @@ 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;
+                }
             }
         }
 
@@ -810,6 +814,10 @@ 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;
+                }
             }
         }