[wp-trac] [WordPress Trac] #63603: Replace deprecated / non-standard CSS for `speak` and `aural`

[WordPress Trac]

#63603: Replace deprecated / non-standard CSS for `speak` and `aural`
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 Reporter:  krokodok            |      Owner:  (none)
     Type:  enhancement         |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  General             |    Version:  trunk
 Severity:  normal              |   Keywords:
  Focuses:  accessibility, css  |
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 Both `speak: never` and `@media aural` are deprecated and/or non-standard.
 They are exclusively used for font-icons on pseudo elements. We can
 replace them with the syntax `content: "\icon-code" / ""`, which is widely
 supported.

 Examples of files where this is used:
 – …/src/wp-admin/css/common.css
 – …/src/wp-admin/css/themes.css

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Ticket URL: <https://core.trac.wordpress.org/ticket/63603>
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