Automatic merge of T1.5.1-1741-gf80cfb5d1 and 21 pull requests

- Pull request #570 at 362e4e7: glTF 2.0 support with PBR lighting
- Pull request #1030 at d3ae4a2: Refactor settings, in prep for settings exporter
- Pull request #1052 at 3b5cb90: Content Manager: Add axle count, and lowest derail force
- Pull request #1062 at bbc0013: Train Forces popup Window.
- Pull request #1064 at cb510d6: Add Train Info tab to Help window (F1)
- Pull request #1066 at 62c89c1: Log derailment, using TraceInformation.
- Pull request #1082 at a3128ae: Allow variable water level in glass gauge
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #1049 at 6a0c471: Re-organise document storage and access
- Pull request #1057 at 84592f7: Switchable brake system
- Pull request #1069 at 99fc9ac: Mouse wheel control only with Alt – Followup for #1051
- Pull request #1070 at f818e40: Fix a NullReferenceException in TCS scripts
- Pull request #1071 at 722dd3f: Change cover image for v1.6
- Pull request #1074 at e9a66c1: Gradient - commit 2024-16-12
- Pull request #1076 at 3bbd537: Allow depart early
- Pull request #1077 at 7e73abd: Fix SME brakes not working
- Pull request #1078 at 9ab642e: Default PowerSupply script for steam locomotives
- Pull request #1079 at 5e37059: Adds Polish transations
- Pull request #1080 at a637cb8: arranges Options > System tab for longer texts
- Pull request #1083 at 7e6fb60: Menu contents route name clash
- Pull request #1081 at 689494b: Brake cuts power unification

Author: openrails-bot

Source/RunActivity/Viewer3D/Shapes.cs

@@ -2734,7 +2734,8 @@ public virtual Matrix GetMatrixProduct(int iNode)
         /// </summary>
         /// <param name="animationId">For stf files it is the node id, for gltf files it is the animation id.</param>
         /// <returns>true if there is no internal seqence defined in the shape.</returns>
-        public virtual bool IsAnimationArticulation(int animationId) => Animations?.FirstOrDefault()?.anim_nodes?.ElementAtOrDefault(animationId)?.controllers.Count == 0;
+        public virtual bool IsAnimationArticulation(int animationId) =>
+            !(Animations?.FirstOrDefault()?.anim_nodes is anim_nodes a && a.Count > animationId && a.ElementAtOrDefault(animationId)?.controllers is controllers c && c.Count > 0);
 
         /// <summary>
         /// Returns the parent animation id.