First, congratulations to have added that feature, even if I have to press Shift key. That means that you have found a manner to code it. So, now we can scroll by page or by 3 lines, according to Shift on/off.
My (I say "my", but am I alone ?) problem is that I scroll almost every time by page, and only few times by line. It seems to me much more automatic to wheel without Shift. That's why I'd prefer scroll by page without shift. Perhaps any other users think the opposite.
Maybe as xml setting.
So this is a very good idea, waiting a possible extra option that would perhaps overload the option dialog.
Anyway, I thank you once more for having considered and already resolved my request.
Regarding configurations in other editors, I have neither found any particular settings in EditPlus, PsPad, Notepad++. That's why I have not provided you them.