Little suggestion for Faustus currency excange

Right now in the Faustus exchange when you select an item in the "i want" or "i have" box, if you then select that box again to change the item, you go to the main page.

It would be better if clicking it will go to the previous visited folder (es. if i was buying a div card, if i click again the "i want box" it go to the "divination card folder).

Alternatively this function can be added besides the "i want" and "i have"boxes as a button (a "go back" funcion), while the "i want" and "i have" boxes continue to work as now.

Thanks fot your time, cheers.