New parts selector won't work with trackball.

I just recently installed the new update for experimental (v3.7.1) and while I love the menu improvements, the HTML parts selector (while it DOES change parts now) doesn't respond to the mouse cursor when i'm selecting variations of single parts. I'm currently using a Logitech Trackman (the one with the ball in the center) that has no scroll wheel. Are there any keyboard controls that can do this, or is it a glitch?

 

try the up and down keys

 

mouse+up and down keys to highlight, enter to select.

 

I just learned this, but the parts can be selected by pressing the letter key that the part starts with once you expand the individual part category. More annoying than just using the mouse cursor, as the buttons still perform all of their functions while selecting parts, and it's generally slower. But, this is experimental.