Widgets: Add missing `label` and `description` to Customizer controls.

This fixes a bug where the “Move To” dialogue was empty when a theme has multiple widget areas.

Props kevin940726, noisysocks, hellofromTonya.
Fixes #53487.
Built from https://develop.svn.wordpress.org/trunk@51228


git-svn-id: http://core.svn.wordpress.org/trunk@50837 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-widgets.php

@@ -480,8 +480,10 @@ final class WP_Customize_Widgets {
 							$this->manager,
 							$setting_id,
 							array(
-								'section'    => $section_id,
-								'sidebar_id' => $sidebar_id,
+								'section'     => $section_id,
+								'sidebar_id'  => $sidebar_id,
+								'label'       => $section_args['title'],
+								'description' => $section_args['description'],
 							)
 						);
 					} else {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-beta3-51227';
+$wp_version = '5.8-beta3-51228';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.