use uitoolkit propertyfield cant editable and gray in node graph

[wechat_os_Qy01UPtHqaZPDQbZBrdGL7hGA]

  public VisualElement GetParameterSettingsField(ExposedParameter parameter, Action<object> valueChangedCallback)
        {
            
            serializedObject.Update();
            VisualElement view = new VisualElement();
            
            int propIndex = FindPropertyIndex(parameter);
            var serializedParameter = serializedParameters.GetArrayElementAtIndex(propIndex);
            serializedParameter.managedReferenceValue = exposedParameterObject.parameters[propIndex];
            var serializedSettings = serializedParameter.FindPropertyRelative(nameof(ExposedParameter.settings));
            serializedSettings.managedReferenceValue = exposedParameterObject.parameters[propIndex].settings;
            var settingsField = new PropertyField(serializedSettings);
            settingsField.Bind(serializedObject);
            view.Add(settingsField);
            
            // TODO: see if we can replace this with an event
            oldParameterSettings[parameter] = parameter.settings;
            view.Add(new IMGUIContainer(() =>
            {
                if (oldParameterSettings.TryGetValue(parameter, out var settings))
                {
                    if (!settings.Equals(parameter.settings))
                        valueChangedCallback(parameter.settings);
                }
                oldParameterSettings[parameter] = parameter.settings;
            }));

            return view;
        }