Feature request: Mouse input support for scrollbar

[williamd1k0]

Follow up of #869.

DUOLabs333 commented on Sep 15, 2021
I know this would be much harder, but is it possible to add mouse support so I can drag the scrollbar up and down?

[plutonium-239]

#1021 was a start :/
nothing happened there, though. Maybe someone can pick up off where they left?