FIX: Input System actions not auto-saving in Project Settings when both related windows were open

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Fixed
 
+- Fixed auto-save not working for Input System actions in Project Settings when both the Project Settings and Input System Actions windows were open [UUM-134035](https://jira.unity3d.com/browse/UUM-134035)
 - Improved New Input System warning dialog, Native Device Inputs Not Enabled [UUM-132151].
 - Fixed caching for InputControlPath display name [ISX-2501](https://jira.unity3d.com/browse/ISX-2501)
 

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/InputActionsEditorSettingsProvider.cs

@@ -178,7 +178,7 @@
             // This code should be cleaned up once we migrate the InputControl stuff from ImGUI completely.
             // Since at that point it stops being a separate window that steals focus.
             // (See case ISXB-1713)
-            if (!InputEditorUserSettings.autoSaveInputActionAssets || m_View.IsControlSchemeViewActive())
+            if (m_View.IsControlSchemeViewActive())
             {
                 return;
             }

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/InputActionsEditorWindow.cs

@@ -258,10 +258,28 @@
             rootVisualElement.Clear();
             if (!rootVisualElement.styleSheets.Contains(InputActionsEditorWindowUtils.theme))
                 rootVisualElement.styleSheets.Add(InputActionsEditorWindowUtils.theme);
+
+            if (IsProjectSettingsWindowInputAsset())
+            {
+                var helpBox = new HelpBox(
+                    "This asset is assigned as the Project-wide Input Actions in Project Settings. Changes here affect input for the entire project.",
+                    HelpBoxMessageType.Info);
+                rootVisualElement.Add(helpBox);
+            }
+
             m_View = new InputActionsEditorView(rootVisualElement, m_StateContainer, false, () => Save(isAutoSave: false));
             m_StateContainer.Initialize(rootVisualElement.Q("action-editor"));
         }
 
+        private bool IsProjectSettingsWindowInputAsset()
+        {
+            var projectWideActions = InputSystem.actions;
+            if (projectWideActions == null)
+                return false;
+            var path = AssetDatabase.GUIDToAssetPath(m_AssetGUID);
+            return path == AssetDatabase.GetAssetPath(projectWideActions);
+        }
+
         private void OnStateChanged(InputActionsEditorState newState, UIRebuildMode editorRebuildMode)
         {
             DirtyInputActionsEditorWindow(newState);