Avoid adjusting the current submenu position when tabbing through the admin menu.

Fixes #30349
Props 5um17

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Display a faux revision when a post only has one revision but has an autosave.

Fixes #29044
Props adamsilverstein

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Add some specific JSON responses when there are user permission errors for AJAX file uploads. Replace some usage of `wp_json_encode()` with `wp_send_json_*()`.

See #25849
Props gcorne

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Allow the response code to be passed as a shorthand to the `$title` or `$args` parameter of `wp_die()`, for brevity.

See #10551 and #11286
Props nacin

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Switch to a `403` response code in places where it is more appropriate than a `500` due to permissions errors.

Fixes #10551
Props nacin

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Add `$user_login` and `$user_data` parameters to the `retrieve_password_message` filter.

Props ivankristianto, dcavins
Fixes #25853

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Add `$depth` parameter to the `nav_menu_css_class`, `nav_menu_item_id`, and `nav_menu_link_attributes` filters.

Fixes #19064
Props cyclometh, chriscct7, johnbillion

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