listbox and Scroll

[scenaristeur]

Hi,
I think the scroll in the listbox works in the opposite way of the normal way :
When I scroll Up, the listbox goes Down and when I scroll Down, It goes Up.

I fixed it with a "minus" to get "-step" instead of "step" at the line 410 of the https://github.com/fjenett/Guido/blob/master/src-js/de.bezier.gui.js file.

But perharps is this not a good way ?