Indicate that the user deletion process affects all content attributed to a given user, not just posts. props seanchayes. fixes #26709.

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Remove trailing whitespace in dashicons.css.
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git-svn-id: http://core.svn.wordpress.org/trunk@27264 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce a `.dashicons-before` CSS class.

If you want to use a Dashicon before an element you can use the class because it will not change the elements content styling. With that you don't need to copy the entire `.dashicons` styling to your :before styling anymore.
To demonstrate this change, Admin Menu now uses Dashicons classes directly.

And it fixes a glitch in IE.

fixes #26630.
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Add widget management to the customizer.

This brings in the Widget Customizer plugin: https://wordpress.org/plugins/widget-customizer/.

props westonruter, shaunandrews, michael-arestad, johnregan3, akeda, topher1kenobe, topquarky, bobbravo2, ricardocorreia. And for good measure, props westonruter.
see #27112.

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Add a timestamp to the urls passed to `<audio>` and `<video>` in the modal to ensure that cached view instances aren't referenced by MEjs. Pause the player when closing the controller's modal.

See #27016, #26779.


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Ensure that all a/v attribute names have a leading space when the tags are dynamically-generated via Underscore templates.

See #27016.


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Update the list of HTTP status code descriptions. Fixes #16914. Props sirzooro and hakre for the original patches.
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git-svn-id: http://core.svn.wordpress.org/trunk@27269 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow `get_page_by_path()` and `get_page_by_title()` to accept an array of post types. Fixes #24763. Props zbtirrell.
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git-svn-id: http://core.svn.wordpress.org/trunk@27270 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Deprecate `format_to_post()` and remove its filter. Fixes #25526. Props simonwheatley
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Admin Menu: Use `.dashicons-before` as default $img_class.

props kovshenin for noticing and testing.
see #26630.
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TinyMCE: when parsing [caption] and the width attribute is missing, recreate it from the image tag width, fixes #23103
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TinyMCE: remove border-radius and padding from placeholder images, props avryl, see #27106
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