Automatic merge of T1.5.1-1806-g5522fc5fa and 11 pull requests

- Pull request #570 at 362e4e7: glTF 2.0 support with PBR lighting
- Pull request #1062 at bbc0013: Train Forces popup Window.
- Pull request #1064 at 1be1fc4: Add Train Info tab to Help window (F1)
- Pull request #1067 at 5bf4677: Traction and dynamic brake retardation
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #1074 at e9a66c1: Gradient - commit 2024-16-12
- Pull request #1076 at 3bbd537: Allow depart early
- Pull request #1085 at 37e2817: updates key commands for Train Operations window and also Daylight Offset
- Pull request #1086 at e10390b: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #1081 at 689494b: Brake cuts power unification

Author: openrails-bot

Source/Orts.Parsers.Msts/STFReader.cs

@@ -647,7 +647,7 @@ public double ReadDouble(double? defaultValue)
         /// </summary>
         // Additional entries because MSTS has multiple default units, e.g. some speeds in metres/sec and others in miles/hr
         [Flags]
-        public enum UNITS
+        public enum UNITS : ulong
         {
             /// <summary>No unit parsing is done on the {constant_item} - which is obviously fastest
             /// </summary>
@@ -829,7 +829,7 @@ public enum UNITS
             /// <summary>Valid Units: w/s, kw/s, hp/s
             /// <para>Scaled to watts per second.</para>
             /// </summary>
-            PowerRate = 1 << 31,
+            PowerRate = 1ul << 31,
 
             // "Any" is used where units cannot easily be specified, such as generic routines for interpolating continuous data from point values.
             // or interpreting locomotive cab attributes from the ORTSExtendedCVF experimental mechanism.