Made the Item.resizable trait default value = Undefined in order to allow the layout code to determine whether the developer intentionally wants the size to be fixed or variable or wants to leave it up to the associated editor (the default).
Made the Item.resizable trait default value = Undefined in order to allow the layout code to determine whether the developer intentionally wants the size to be fixed or variable or wants to leave it up to the associated editor (the default).

burnpanck/traits,burnpanck/traits