Media: Register the wp-media-utils style handle.

The media editor modal rendered without its intended styles, because the stylesheet it relies on was never registered in core. Registering the handle makes the modal display as intended.

Developed in WordPress#12813

Props afercia, andrewserong, gulamdastgir04, mdridipu, ramonopoly, softglaze, wildworks.
Fixes #65794.

git-svn-id: https://develop.svn.wordpress.org/trunk@63007 602fd350-edb4-49c9-b593-d223f7449a82

Author: t-hamano

src/wp-includes/script-loader.php

@@ -1781,9 +1781,11 @@ function wp_default_styles( $styles ) {
 			'wp-reusable-blocks',
 			'wp-patterns',
 			'wp-preferences',
+			'wp-media-utils',
 		),
 		'format-library'       => array(),
 		'list-reusable-blocks' => array( 'wp-components' ),
+		'media-utils'          => array( 'wp-components' ),
 		'reusable-blocks'      => array( 'wp-components' ),
 		'patterns'             => array( 'wp-components' ),
 		'preferences'          => array( 'wp-components' ),
@@ -1892,6 +1894,7 @@ function wp_default_styles( $styles ) {
 		'wp-editor',
 		'wp-format-library',
 		'wp-list-reusable-blocks',
+		'wp-media-utils',
 		'wp-reusable-blocks',
 		'wp-patterns',
 		'wp-nux',