No year scrolling
Fragment of a discussion from Extension talk:Semantic Forms Inputs
Either way would work. I'd be surprised if it's hard to fix the existing control though. When you click on the year control, if you select the earliest year in the list the control disappears and shows the year selected. The next time you click on the control the year previously selected is centred in the list and you can go back another ten years. The control can eventually be 'hacked' to get back to the year that you want, you just can't get there via the scroll buttons.