Automatic merge of T1.6-rc6-37-g6dd094783 and 16 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 #1143 at 71e57d2: Status in Work Orders popup set too fast
- Pull request #1144 at cd790b9: update Spanish translations
- Pull request #1145 at 875b084: Content Manager: Fix exception when searching; path was added twice to search list.
- Pull request #1146 at ec44b47: Fix for pantograph events not sent in AI trains
- 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/Orts.Simulation/Common/Scripting/PowerSupply/LocomotivePowerSupply.cs

@@ -395,7 +395,7 @@ protected void SignalEventToOtherTrainVehicles(PowerSupplyEvent evt)
         /// </summary>
         protected void SignalEventToOtherTrainVehiclesWithId(PowerSupplyEvent evt, int id)
         {
-            if (Locomotive == Train.LeadLocomotive)
+            if (Locomotive == Train.LeadLocomotive || (Train.LeadLocomotive == null && IndexOfLocomotive() == 0))
             {
                 foreach (TrainCar car in Train.Cars)
                 {