* Add mediawiki ui button styles to Vector and convert language
button to a quiet button
* Restore the arrow for language button with ULS
* Vertically align button to first line of header
* Add a storybook entry for LanguageButton
Additional changes:
* Fix issues revealed by storybook - menu dropdown should
reset generic typography rule for `ul` tags
* Allow quotes usage in storybook without disable rule
Bug: T268241
Change-Id: I483350084fb46a51c50af6aab78c62db6d02df89
Jdlrobson
jdlrobson