joedolson ee24b9b733 Media: Change alt attribute field to textarea in media library.
Change the input field used for `alt` attributes in the media library views from a text input to a textarea. This gives users more flexibility in resizing the field for easier management of longer alt attributes. 

This patch includes a less-common use of `esc_attr` for a `textarea`. This is because the primary usage of the `alt` attribute will be escaped using `esc_attr`, and the value in editing should match the value output on the front end.

Props edent, sabernhardt, afercia, JavierCasares, audrasjb, joedolson.
Fixes #50066.
Built from https://develop.svn.wordpress.org/trunk@54243


git-svn-id: http://core.svn.wordpress.org/trunk@53802 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-09-20 04:02:10 +00:00
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