Add 'wp_link_query_args' and 'wp_link_query' filters to allow for customizing the internal linking dialog. props CoenJacobs, goldenapples. fixes #18042.
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Clarify a string in discussion settings. props Ipstenu, DrewAPicture. fixes #16705.
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Add `media_submitbox_misc_sections` and `audio_submitbox_misc_sections` filters to allow removing or adding of attachment submitbox sections containing attachment metadata. props desroj, DrewAPicture. fixes #25171.

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Add dynamic classes for attachment metadata submitbox sections. see #22333, #25171.

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Avoid PHP notices when configuring the Incoming Links dashboard widget. fixes #25250.
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