Sub-menu Height Limit / Use Scrollbars

[andreaxhearts]

See #202, #514,

For the all programs list:
Either a height limit value for where it overflows to a new column, and/or have contents in a much smaller menu with a scrollbar instead.
(And ideally, having the navigable alphabetical groups that Windows 10/11 has.)

My preference is the programs menu that is separate from the main menu
(like Windows 9x, which probably could show more than two columns).
But you could also do it like #1103.

Right now it takes up the entire height of my 1440p display, or nearly all of it.

It's really the only thing that's stopping me from considering using Open-Shell as a Start menu replacement. It would be great to see!

Windows 10 / style: Classic with two columns / skin: Fluent Refresh