FIX: NullReferenceException from Path dropdown. (#1887)

* FIX: NullReferenceException from Path dropdown.

---------

Co-authored-by: Stefan Schubert <[email protected]>
Co-authored-by: StefanUnity <[email protected]>

Author: graham-huws

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -8,7 +8,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 Due to package verification, the latest version below is the unpublished version and the date is meaningless.
 however, it has to be formatted properly to pass verification tests.
 
-## [Unreleased] - YYYY-MM-DD
+## [1.8.1] - 2024-03-14
+
+### Fixed
+- NullReferenceException thrown when editing a binding path in InputActionAsset windows.
 
 ## [1.8.0] - 2024-03-12
 

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

@@ -112,6 +112,9 @@ void SaveAssetOnFocusLost()
 
         public static void SetIMGUIDropdownVisible(bool visible, bool optionWasSelected)
         {
+            if (m_ActiveSettingsProvider == null)
+                return;
+
             // If we selected an item from the dropdown, we *should* still be focused on this settings window - but
             // since the IMGUI dropdown is technically a separate window, we have to refocus manually.
             //