Automatic migration. Original reporter: "lcy03406"
The name of item rendering area of ItemListbox and Listbox are different. It is 'ItemRenderingArea' in Listbox and 'ItemRenderArea' in ItemListbox. If we can unify these, the two type of widgets can use a same looknfeel. At present, when I design a new style of listbox with new background or scrollbar, I must write two looknfeels.