FIX propwarning on basebutton && ADD style prop on basebutton

[ndelangen]

Issue: #2292 (review)

[codecov]

Codecov Report

Merging #2305 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2305   +/-   ##
=======================================
  Coverage   21.19%   21.19%           
=======================================
  Files         283      283           
  Lines        6156     6156           
  Branches      731      724    -7     
=======================================
  Hits         1305     1305           
- Misses       4296     4300    +4     
+ Partials      555      551    -4

Impacted Files	Coverage Δ
app/vue/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/vue/src/server/babel_config.js	0% <0%> (-77.42%)	⬇️
app/react/src/server/utils.js	0% <0%> (-53.58%)	⬇️
addons/knobs/src/components/PropField.js	10.63% <0%> (ø)	⬆️
addons/knobs/src/components/types/Boolean.js	11.62% <0%> (ø)	⬆️
...codemod/src/transforms/update-organisation-name.js	40.62% <0%> (ø)	⬆️
addons/info/src/components/markdown/htags.js	30% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
addons/knobs/src/components/types/Select.js	7.93% <0%> (ø)	⬆️
...res__/update-addon-info/update-addon-info.input.js	0% <0%> (ø)	⬆️
... and 23 more

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