Aaron Jorbin 0d820bf585 About Page: update CSS with prefixes
Backports [40885] from trunk to 4.8.

Seconded by melchoyce.

See #40721.

Built from https://develop.svn.wordpress.org/branches/4.8@40886


git-svn-id: http://core.svn.wordpress.org/branches/4.8@40736 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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2017-06-08 04:53:32 +00:00