[Bug: 21.4.19] smooth vscroll-{up,down}

[Stephen J. Turnbull]

J$(D+1(Br$(D+T(Bme Bouat writes:

 > Could you add an option for smooth scrolling

Refactoring window configuration and redisplay to be more friendly to
pixel-based scrolling has been discussed, but AFAIK nobody is actively
working on it, and AFAIK it's not currently possible in any version of
XEmacs.  Contributions welcome.