Customize: Prevent navigation in preview when clicking on child elements of preview links that have non-previewable URLs.

Fixes #39098.

Built from https://develop.svn.wordpress.org/trunk@39584


git-svn-id: http://core.svn.wordpress.org/trunk@39524 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/customize-preview.js

@@ -138,7 +138,7 @@
 		 */
 		handleLinkClick: function( event ) {
 			var preview = this, link, isInternalJumpLink;
-			link = $( event.target );
+			link = $( event.target ).closest( 'a' );
 
 			// No-op if the anchor is not a link.
 			if ( _.isUndefined( link.attr( 'href' ) ) ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39583';
+$wp_version = '4.8-alpha-39584';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.