If you want to use a Dashicon before an element you can use the class because it will not change the elements content styling. With that you don't need to copy the entire `.dashicons` styling to your :before styling anymore.
To demonstrate this change, Admin Menu now uses Dashicons classes directly.
And it fixes a glitch in IE.
fixes#26630.
Built from https://develop.svn.wordpress.org/trunk@27418
git-svn-id: http://core.svn.wordpress.org/trunk@27265 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The admin CSS was merged in #18314.
After a couple years as it stood,
The mess it had become just was no good.
One day we realized Grunt is pretty cool,
And said "we should use this as our build tool!"
Now we can maintain separate files with ease,
Using @import and cssmin meets all our needs.
Welcome to the future of the WordPress stylesheets,
And thanks to Slick Rick for the beats.
props jorbin for the initial patch.
fixes#26669.
Built from https://develop.svn.wordpress.org/trunk@27195
git-svn-id: http://core.svn.wordpress.org/trunk@27054 1a063a9b-81f0-0310-95a4-ce76da25c4cd
