Don't scroll story on knob change

[Hypnosphi]

Issue: When changing knobs, example is scrolled to top

[codecov]

Codecov Report

Merging #3639 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #3639      +/-   ##
==========================================
- Coverage   39.99%   39.98%   -0.01%     
==========================================
  Files         481      481              
  Lines        5248     5249       +1     
  Branches      862      863       +1     
==========================================
  Hits         2099     2099              
  Misses       2631     2631              
- Partials      518      519       +1

Impacted Files	Coverage Δ
lib/core/src/client/preview/start.js	0% <0%> (ø)	⬆️

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[Hypnosphi]

Released as 4.0.0-alpha.8

[Primigenus]

I don't know if this change is what caused it, but now I'm seeing the page scroll to the bottom (in fact, all scrollable elements on the page get scrolled to the bottom/to the right) when changing a knob. From your code change it doesn't seem like it would be related, but perhaps the reason the code was there was to offset this behavior?

[Hypnosphi]

I can't reproduce it in our official examples, can you?

[ndelangen]

I can't either

[Primigenus]

Hmm. I did some testing to figure out what's different on my end and it looks like it's the addon-a11y decorator, which is running each re-render and causing everything to scroll. Has something changed about it recently? I've had the addon since I started this storybook and it's only recently started doing this. (There is also a significant performance hit associated with axe running each time you change a knob -- ah, just found #3683)