Avoid PHP notices in get_sample_permalink() and get_sample_permalink_html(). Remove unused global reference. props ocean90. fixes #25005.

Built from https://develop.svn.wordpress.org/trunk@25028


git-svn-id: http://core.svn.wordpress.org/trunk@25015 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-controls.js

@@ -862,7 +862,7 @@
 			if ( 9 === event.which ) // tab
 				return;
 			if ( 13 === event.which ) // enter
-				parent.send( 'close' );
+				this.click();
 			event.preventDefault();
 		});