FIX: index out of bounds after undo duplicating action maps (ISX-1661) (#1780)

* fixed index out of bounds after undo duplicating action maps

* added changelog

Author: ritamerkl

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -34,8 +34,10 @@ however, it has to be formatted properly to pass verification tests.
 - Fixed an issue where undoing deletion of Action Maps did not restore Actions correctly.
 - Fixed case [ISXB-628](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-628) (OnIMECompositionChange does not return an empty string on accept when using Microsoft IME) by clarifying expectations and intended usage for the IME composition change event.
 - Fixed case [ISX-1668] (The Profiler shows incorrect data and spams the console with "Missing Profiler.EndSample" errors when there is an Input System Component in Scene).
+- Fixed [ISX-1661](https://jira.unity3d.com/browse/ISX-1661) where undoing duplications of action maps caused console errors
 - Fix for BindingSyntax `WithInteraction()` which was incorrectly using processors.
 
+
 ## [1.8.0-pre.1] - 2023-09-04
 
 ### Added

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/Views/ActionsTreeView.cs

@@ -308,20 +308,17 @@ internal static partial class Selectors
         public static List<TreeViewItemData<ActionOrBindingData>> GetActionsAsTreeViewData(InputActionsEditorState state)
         {
             var actionMapIndex = state.selectedActionMapIndex;
-            var actionMaps = state.serializedObject.FindProperty(nameof(InputActionAsset.m_ActionMaps));
-
             var controlSchemes = state.serializedObject.FindProperty(nameof(InputActionAsset.m_ControlSchemes));
-            var actionMap = actionMapIndex == -1 || actionMaps.arraySize <= 0 ?
-                null : actionMaps.GetArrayElementAtIndex(actionMapIndex);
+            var actionMap = GetSelectedActionMap(state);
 
             if (actionMap == null)
                 return new List<TreeViewItemData<ActionOrBindingData>>();
 
-            var actions = actionMap
+            var actions = actionMap.Value.wrappedProperty
                 .FindPropertyRelative(nameof(InputActionMap.m_Actions))
                 .Select(sp => new SerializedInputAction(sp));
 
-            var bindings = actionMap
+            var bindings = actionMap.Value.wrappedProperty
                 .FindPropertyRelative(nameof(InputActionMap.m_Bindings))
                 .Select(sp => new SerializedInputBinding(sp))
                 .ToList();