bug#32717: 26.1; Wheel-mouse down-scrolling leads to almost scroll a buffer out of its frame

[Eli Zaretskii]

> From: Konrad Podczeck <konrad.podczeck@univie.ac.at>
> Date: Wed, 12 Sep 2018 18:46:19 +0200
> Cc: 32717@debbugs.gnu.org
> 
> > This is a feature.  (Other applications behave like that, and there
> > were enough Emacs users who wanted a similar behavior in Emacs.)  If
> > you don't like this behavior, customize the variable
> > scroll-bar-adjust-thumb-portion to the nil value.
> 
> Doing this has no effect. Maybe because I use the NS-port: The documentation 
> of this variable speaks of GTK and Motif ports.

If you are using NS, then I guess this is how the respective toolkit
works?  Or maybe someone would like to implement
scroll-bar-adjust-thumb-portion support for NS?