[IMP] pos_restaurant: allow re-ordering of the restaurant floors
[IMP] pos_restaurant: automatically display floors if they have been setup (removed config option)
[IMP] point_of_sale: moved the barcode field to the view header, and gave it a simpler name
[IMP] point_of_sale: pos config view improvement
[IMP] point_of_sale: removing obsolete field
[IMP] point_of_sale: better names for the pos config fields