Widgets: Ensure media is explicitly enqueued from Text widget in case Media widgets are unregistered.

Amends [41344].
See #40854.
Fixes #43125 for 4.9 branch.

Built from https://develop.svn.wordpress.org/branches/4.9@42546


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42375 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.3-alpha-42544';
+$wp_version = '4.9.3-alpha-42546';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-includes/widgets/class-wp-widget-text.php

@@ -396,6 +396,7 @@ class WP_Widget_Text extends WP_Widget {
 	 */
 	public function enqueue_admin_scripts() {
 		wp_enqueue_editor();
+		wp_enqueue_media();
 		wp_enqueue_script( 'text-widgets' );
 		wp_add_inline_script( 'text-widgets', 'wp.textWidgets.init();', 'after' );
 	}