Faustus Currency Exchange: Focus on Filter Input Field

I do like the newly introduced currency exchange very much. It's also very nice that you can trade a plethora of stackable items. A small improvement would be that when "click to select" dialog is opened with tons of the different items, that focus for entry is on the filter input filed at the bottom.

If that was the case, I can just type the item I'm looking for instead of first having to click into the field on the bottom.