void OnEnable()
{
controllerNames = XmlLayoutUtilities.GetXmlLayoutControllerNames();
controllerNames.Insert(0, "Create New");
controllerNames.Insert(0, "None");
xmlFileNames = GetAssetsOfType <TextAsset>(".xml").Select(x => AssetDatabase.GetAssetPath(x).Substring("Assets/".Length)).ToList();
xmlFileNames.Insert(0, "Create New");
xmlFileNames.Insert(0, "None");
}