There's no ProfitUI update for this yet. If you need it, I'd either just delete the eq2ui_inventory_inventory.xml file and go back to the default inventory window, or look at Seagoat's or Uberfuzzy's custom inventory windows (both of which support the appearance slots) or one of the other recently-released ones. You can find them at the top of
http://www.eq2interface.com/downloads/cat103.html