Sergey Biryukov f9b60d3334 Accessibility: Login and Registration: Respect the prefers-reduced-motion media query for "shake" CSS animation on login failure.
This shake should not occur when the user has opted to reduce motion, for example by selecting the "Reduce motion" option in macOS' preferences or unselecting "Show animations in Windows" in Windows' preferences.

Follow-up to [47226].

Props eddystile, johnbillion, sabernhardt, afercia, audrasjb.
Fixes #49723.
Built from https://develop.svn.wordpress.org/trunk@47813


git-svn-id: http://core.svn.wordpress.org/trunk@47589 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-05-16 20:25:19 +00:00
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