2 - Submenu :
- click on a product in the list to add or remove (if possible) a product in the current order, depending on the selected tool (8 or 9).
- enter key to add or remove (if possible) the active product in the current order, depending on the selected tool (8 or 9).
- top/bottom arrows keys to go from an item to an other in the submenu (start/end looped).
- left arrow key to swap to the original menu (1).