Customize: Ensure `customized` changes pending to be written into changeset are successfully injected into Ajax requests in preview.

Amends [40704].
See #42162.

Built from https://develop.svn.wordpress.org/trunk@41804


git-svn-id: http://core.svn.wordpress.org/trunk@41638 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/customize-preview.js

@@ -451,6 +451,10 @@
 			if ( ! api.settings.theme.active ) {
 				queryParams.customize_theme = api.settings.theme.stylesheet;
 			}
+
+			// Ensure preview nonce is included with every customized request, to allow post data to be read.
+			queryParams.customize_preview_nonce = api.settings.nonce.preview;
+
 			urlParser.search = $.param( queryParams );
 			options.url = urlParser.href;
 		};

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-beta1-41803';
+$wp_version = '4.9-beta1-41804';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.