combobox unresponsive to mousewheel

thought this would be an easy fix, but nooo.
Combobox seems to use something else instead of leveraging nk_panel - which has all the scrollbar behaviour handling inside.
There is a scrollbar that shows up in the combo, however, it does not move with the mouse wheel as it should.
I'm surprised that the combo box is a customized solution, rather than leveraging nk_panel

Is there an easy fix for this, possibly?

thanks

Start by tracing the combobox scrollbar handling and comparing it with nk_panel, which the issue identifies as having scrollbar behavior. Reproduce the mouse-wheel interaction and confirm that the combobox scrollbar moves with the wheel when the work is done.

Written by the indexing model from the issue text.