Query: Fix category handling in pre_get_posts when pretty permalinks are in use (category_name query variable).

Merges [26864] [26874] [26875] to the 3.8 branch.

props wonderboymusic, SergeyBiryukov.
fixes #26627.

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Fix incorrect -mox prefixes in CSS.

Merges [26887] to the 3.8 branch.

props morganestes.
fixes #26702.

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Break long words in Quick Draft content to prevent ugly overflow, as was previously done.

Merges [26928] to the 3.8 branch.

props aubreypwd, SergeyBiryukov.
fixes #26658.

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

Merges [26920] to the 3.8 branch.

props iammattthomas.
fixes #26537.

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Fix CSS clashes on the Network Themes page.

Merges [26919] [26923] to the 3.8 branch.

props SergeyBiryukov.
fixes #26513, #26517.

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Avoid a fatal error in wp_reset_postdata() if $wp_query global is not set.

Merges [25932] to the 3.9 branch.

props SergeyBiryukov.
fixes #26775.

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RTL: Flip half-star star ratings.

Merges [26952] to the 3.8 branch.

props SergeyBiryukov.
fixes #26814.

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Force LTR direction for code and plugin/theme editors.

Merges [26888] to the 3.8 branch.

props SergeyBiryukov, nivijah.
fixes #26666.

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Change 'Width' to 'Layout' to match the hard-coded list of translatable theme features in get_theme_feature_list().

Merges [26905] to the 3.8 branch.

props janrenn.
fixes #26777.

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Keyboard navigation friendliness for themes.php.

Merges [26922] to the 3.8 branch.

props matveb, azaozz, jorbin.
fixes #26527.

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Themes: Search the theme's slug too.

Merges [26921] to the 3.8 branch.

props matveb.
see #26730.

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