Automatic merge of T1.5.1-922-g0a17d985e and 15 pull requests

- Pull request #570 at 3539862: Experimental glTF 2.0 support with PBR lighting
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #882 at 3ca0eb1: Blueprint/train car operations UI window
- Pull request #885 at dcd4f7d: feat: Add notifications to Menu
- Pull request #886 at 6c0785b: Scene viewer extension to TrackViewer
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #903 at 29f3d1a: Downloading route content (Github, zip)
- Pull request #912 at f7b85e4: New Triple Valve Features Vol. 2
- Pull request #919 at 26cc6a8: Added mouse wheel support for controls which can be moved by pressing t…
- Pull request #923 at e0f3c55: Add curve squeal to route
- Pull request #924 at 6c2c3cd: Default Asset Improvements
- Pull request #925 at e3b1688: Fix brakeshoe force bug
- Pull request #927 at cf687d4: AI Train Power Supply/Lights Fix

Author: openrails-bot

Source/Menu/Notifications/NotificationManager.cs

@@ -378,7 +378,9 @@ private string ReplaceParameter(string field)
                         : UpdateManager.ChannelName;
                     break;
                 case "new_version":
-                    replacement = UpdateManager.LastUpdate == null || UpdateManager.ChannelName == ""
+                    replacement = UpdateManager.LastUpdate == null 
+                        || UpdateManager.ChannelName == ""
+                        || UpdateManager.LastUpdate.Version == SystemInfo.Application.Version
                         ? "none"
                         : UpdateManager.LastUpdate.Version;
                     break;