Allow non-visible post row actions to be accessed via keyboard. props adamsilverstein, lessbloat. fixes #21334.

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Improve inline documentation for wp-includes/functions.wp-styles.php.

Props kpdesign.
Fixes #25401.

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Allow all non-visible default row actions in the admin to be accessed via keyboard. fixes #21334.

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Introduce register_taxonomy_for_object_type().

props leewillis77.
fixes #11058.

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Improve inline documentation for wp-includes/functions.wp-scripts.php.

Props kpdesign.
Fixes #25402.

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