Show a label for the "Home" page nav menu item checkbox. props SergeyBiryukov. props ericlewis for the initial patch. fixes #25410.

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Twenty Fourteen:  a11y fix for keyboard navigation and Skip Content link, see #25054.
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Twenty Fourteen: remove title attributes for better accessibility. Props sabreuse for original patch, see #25054.
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Make sure when resizing an image according to ratio we do not end up with a zero-pixel width or height.

props plocha.
fixes #25038.

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Only add one body class when multiple post types manage to be present for a post type archive due to pre_get_posts manipulation.

fixes #25341.

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Default themes: Don't use /** docblocks for simple multiline comments.

props DrewAPicture, ericlewis.
fixes #25256.

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Hook documentation for wp-admin/admin.php.

props DrewAPicture for initial patch.
fixes #25442.

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TinyMCE: add support for IE11.
- Add the latest changes from the 3.x branch upstream.
- Reduce the number of calls to tinyMCEPopup.restoreSelection() in our custom plugins.
- Remove the deprecated execCommand("mceBeginUndoLevel");.
See #25281.
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Twenty Fourteen: merge recent stylesheet changes to RTL, and file miscellaneous CSS cleanup.

RTL still needs more responsive fixes, see #25332 -- and a11y menu fixes, see #25054. 
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