Automatic merge of T1.5.1-368-g38888b34f and 8 pull requests

- Pull request #570 at de7a14f: Experimental glTF 2.0 support with PBR lighting
- Pull request #732 at 79e9c38: Improvements for air brakes
- Pull request #751 at 00981a2: Web interface to control cab controls with external hardware
- Pull request #799 at eb92d81: Consolidated wind simulation
- Pull request #803 at 7157e08: Various adjustments to steam adhesion
- Pull request #813 at a23bd5c: Refactored garbage generators
- Pull request #814 at b102c1c: Bug fix for https://bugs.launchpad.net/or/+bug/2013969 Crash after uncoupling player loco of a train with EOT
- Pull request #815 at a5cc165: chore: Add GitHub automatic release notes configuration

Author: openrails-bot

Source/ORTS.Settings/InputSettings.cs

@@ -67,6 +67,7 @@ public class InputSettings : SettingsBase
 
         public static readonly UserCommandInput[] DefaultCommands = new UserCommandInput[Enum.GetNames(typeof(UserCommand)).Length];
         public readonly UserCommandInput[] Commands = new UserCommandInput[Enum.GetNames(typeof(UserCommand)).Length];
+        static readonly UserCommand[] UserCommandValues = (UserCommand[])Enum.GetValues(typeof(UserCommand));
 
         static InputSettings()
         {
@@ -91,7 +92,7 @@ UserCommand GetCommand(string name)
 
         UserCommand[] GetCommands()
         {
-            return (UserCommand[])Enum.GetValues(typeof(UserCommand));
+            return UserCommandValues;
         }
 
         public override object GetDefaultValue(string name)