FIX: Inset the Supported Devices list in Input System settings so it aligns with the other fields [UUM-150207]

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 the "Supported Devices" list in the Input System Package Settings sitting flush against the panel edge with no left/right margin, unlike the surrounding fields; it is now inset to line up with the other settings controls [UUM-150207](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-150207)
 - Fixed the Inspector help button for a selected `.inputactions` asset ("Open Reference for Input Action Importer") opening a missing documentation page; it now links to the Action Assets manual page [UUM-149518](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-149518)
 - Fixed an `OverflowException` when creating a control scheme (or other named item) whose all-numeric name exceeds `Int32.MaxValue`, which previously discarded the entered name and fell back to the default [UUM-145766](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-145766)
 - Fixed the Input Actions editor window logging a "Failed to load asset" exception on editor startup when its saved window layout was restored in a project where the referenced asset GUID did not resolve; the window now closes quietly instead [UUM-144318](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-144318)

Packages/com.unity.inputsystem/InputSystem/Editor/Settings/InputSettingsProvider.cs

@@ -156,7 +156,13 @@
                     + "and avoid picking up input from devices not relevant to the project. When you add devices here, any device that will not be classified "
                     + "as supported will appear under 'Unsupported Devices' in the input debugger.", MessageType.None);
 
-                m_SupportedDevices.DoLayoutList();
+                using (new EditorGUILayout.HorizontalScope())
+                {
+                    GUILayout.Space(3f);
+                    using (new EditorGUILayout.VerticalScope())
+                        m_SupportedDevices.DoLayoutList();
+                    GUILayout.Space(3f);
+                }
 
                 EditorGUILayout.LabelField("iOS", EditorStyles.boldLabel);
                 EditorGUILayout.Space();