Automatic merge of T1.6-89-ga2a9bbcc8 and 13 pull requests

- Pull request #1156 at f46d5f2: Fix incorrectly disabled options in train operations window
- Pull request #1086 at d8d61eb: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1091 at e813c42: Automatic speed control
- 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 #1124 at e241a0d: Built-in PBL2 brake controller
- Pull request #1157 at 39cd994: Dynamic brake authorization by TCS
- Pull request #1159 at 48c9a63: Skip OR warnings about TSRE-specific token Ruler
- Pull request #1161 at 6cfe4e2: Fix string trim in .ini files
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #1128 at 1d7643d: Particle Emitter Overhaul
- Pull request #1160 at 21e55c8: Route Based TTrack Sounds

Author: openrails-bot

Source/Orts.Formats.Msts/SoundManagmentFile.cs

@@ -21,6 +21,7 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Text;
+using Orts.Formats.Msts;
 using Orts.Parsers.Msts;
 
 namespace Orts.Formats.Msts

Source/RunActivity/Viewer3D/Sound.cs

@@ -40,19 +40,20 @@
 //#define DEBUGSCR
 
 using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
 using Orts.Common;
 using Orts.Formats.Msts;
 using Orts.Simulation;
 using Orts.Simulation.AIs;
 using Orts.Simulation.Physics;
 using Orts.Simulation.RollingStocks;
 using Orts.Simulation.Signalling;
+using Orts.Viewer3D;
 using ORTS.Common;
 using ORTS.Settings;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
 using Event = Orts.Common.Event;
 using Events = Orts.Common.Events;