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 492795a: 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 3390e80: Route Based TTrack Sounds

Author: openrails-bot

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/CruiseControl.cs

@@ -511,7 +511,7 @@ public void Initialize()
             else if (MaxForceSelectorController == null)
             {
                 var notches = new List<MSTSNotch>();
-                if (MaxForceSelectorIsDiscrete)
+                if (MaxForceSelectorIsDiscrete && SpeedRegulatorMaxForceSteps > 0)
                 {
                     float numNotches = SpeedRegulatorMaxForceSteps;
                     for (int i=DisableZeroForceStep ? 1 : 0; i<=numNotches; i++)
@@ -538,7 +538,7 @@ public void Initialize()
             else if (SpeedSelectorController == null)
             {
                 var notches = new List<MSTSNotch>();
-                if (SpeedSelectorIsDiscrete)
+                if (SpeedSelectorIsDiscrete && SpeedRegulatorNominalSpeedStepMpS > 0)
                 {
                     if (!DisableZeroSelectedSpeedStep) notches.Add(new MSTSNotch(0, false, 0));
                     if (MinimumSpeedForCCEffectMpS > 0) notches.Add(new MSTSNotch(float.Epsilon, false, 0));