Customize: Spiff up theme updates

Fixes UI bugs around theme updates in the Customizer. Theme versions now get updated and users are no longer left alone after a successful update.

Props rinkuyadav999, celloexpressions for initial patch.
Fixes #42365.


git-svn-id: https://develop.svn.wordpress.org/trunk@42046 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-manager.php

@@ -4276,6 +4276,9 @@ final class WP_Customize_Manager {
 
 		if ( ! is_multisite() && ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) || current_user_can( 'delete_themes' ) ) ) {
 			wp_enqueue_script( 'updates' );
+			wp_localize_script( 'updates', '_wpUpdatesItemCounts', array(
+				'totals' => wp_get_update_data(),
+			) );
 		}
 	}