/// <summary>
 /// Crée un nouveau calque
 /// </summary>
 /// <param name="pTitle">Titre du calque</param>
 public void CreateLayer(string title)
 {
     EditorHelper.Instance.CurrentLayer = ObjectsFactory.CreateLayer(EditorHelper.Instance.GetCurrentStageInstance(), title, EditorHelper.Instance.LastOrdinalLayer + 1, false).Id;
 }