FIX: headers under Action Properties similar to gameObject component headers

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -19,6 +19,7 @@ however, it has to be formatted properly to pass verification tests.
 
 - Fixed the `Auto-Save` toggle button with some extra pixels to align the text in the window better.
 - Align title font size with toolbar style in `Input Action` window.
+- Updated Action Properties headers to use colors consistent with GameObject component headers.
 
 ### Added
 

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/PackageResources/InputActionsEditorStyles.uss

@@ -122,6 +122,11 @@
 
 .properties-foldout-toggle {
     background-color: var(--input-editor-colors-properties-foldout);
+    height: 20px;
+}
+
+.properties-foldout-toggle:hover {
+    background-color: var(--input-editor-colors-properties-foldout-toggle-hover);
 }
 
 .name-and-parameter-empty-label {

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/PackageResources/InputAssetEditorDark.uss

@@ -1,4 +1,5 @@
 :root {
-    --input-editor-colors-properties-foldout: rgb(34, 34, 34);
-    --input-editor-colors-properties-foldout-border: #808080;
+    --input-editor-colors-properties-foldout: #3E3E3E;
+    --input-editor-colors-properties-foldout-border: #1A1A1A;
+    --input-editor-colors-properties-foldout-toggle-hover: #474747;
 }

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/PackageResources/InputAssetEditorLight.uss

@@ -1,4 +1,5 @@
 :root {
     --input-editor-colors-properties-foldout: #DFDFDF;
     --input-editor-colors-properties-foldout-border: #808080;
+    --input-editor-colors-properties-foldout-toggle-hover: #e6e6e6;
 }