Inline documentation for hooks in wp-admin/includes/class-wp-media-list-table.php.

Props theorboman for the initial patch. Props kpdesign.
Fixes #25839.

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Inline documentation for hooks in wp-admin/media-upload.php.

Props piontkowski for the initial patch.
Fixes #26075.

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Inline documentation for hooks in wp-admin/includes/meta-boxes.php.

Props SpencerFinnell for the initial patch.
Fixes #26092.

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Fix CSS clashing on the Network Themes page.

props SergeyBiryukov.
see #26517 for trunk.

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Adjust widths of toolbar items at mobile sizes for better fitting on narrow screens. Fixes toolbar wrapping when using multisite.

props iammattthomas.
see #26537 for trunk.

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Themes: Search the theme's slug too.

props matveb.
see #26730 for trunk.

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Keyboard navigation friendliness for themes.php.

props matveb, azaozz, jorbin.
see #26527.

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Fix another CSS clashing on the Network Themes page.

props SergeyBiryukov.
see #26513 for trunk.
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Pass the $user_id to the `admin_color_scheme_picker` hook for context. props nacin. see #26607 for trunk.

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Dashicons: Update to the latest dashicons files.

props empireoflight, melchoyce.
see #26518 for trunk.
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Uploads: Fix the Order of Operations for wp_mkdir_p() which caused this branch to never be hit. Props fboender. Fixes #26781 for trunk. See #25822

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Break long words in Quick Draft content to prevent ugly overflow, as was previously done. props aubreypwd, SergeyBiryukov. see #26658 for trunk.

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