Index: wp-admin/js/customize-controls.js
===================================================================
--- wp-admin/js/customize-controls.js	(revision 23000)
+++ wp-admin/js/customize-controls.js	(working copy)
@@ -882,7 +882,7 @@
 			if ( 9 === event.which ) // tab
 				return;
 			if ( 13 === event.which ) // enter
-				parent.send( 'close' );
+				window.location = $(this).prop('href');
 			event.preventDefault();
 		});