fix: Correctly find particular string attributes with matching context

This function is unused but is useful

Author: twpol

Source/Orts.Common/GetStringAttribute.cs

@@ -52,13 +52,11 @@ public class GetParticularStringAttribute : GetStringAttribute
         public static string GetParticularPrettyName(string context, Enum value)
         {
             var type = value.GetType();
-            string toBeReturned = type.GetField(Enum.GetName(type, value))
+            return type.GetField(Enum.GetName(type, value))
                 .GetCustomAttributes(false)
                 .OfType<GetParticularStringAttribute>()
-                .SingleOrDefault()
+                .FirstOrDefault(attribute => attribute.Context == context)
                 .Name;
-
-            return toBeReturned;
         }
     }
 }