Skip OR warnings about TSRE-specific token Ruler

Author: Csantucci

Source/Orts.Formats.Msts/WorldFile.cs

@@ -82,6 +82,7 @@ public class Tr_Worldfile : List<WorldObject>
         {
             TokenID.VDbIdCount,
             TokenID.ViewDbSphere,
+            TokenID.Ruler,
         };
 
         public Tr_Worldfile(SBR block, string filename, List<TokenID> allowedTokens)

Source/Orts.Parsers.Msts/TokenID.cs

@@ -1718,6 +1718,9 @@ public enum TokenID : uint
         MaxStackedContainers,
         Length,
         Flipped,
+
+        // TSRE specific
+        Ruler
     }
 
 }