Add Nonce to updating wporg_favorites user meta field

Built from https://develop.svn.wordpress.org/trunk@37145


git-svn-id: http://core.svn.wordpress.org/trunk@37112 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/theme.js

@@ -1548,6 +1548,7 @@ themes.view.Installer = themes.view.Appearance.extend({
 	// Save the user's WordPress.org username and get his favorite themes.
 	saveUsername: function ( event ) {
 		var username = $( '#wporg-username-input' ).val(),
+			nonce = $( '#wporg-username-nonce' ).val(),
 			request = { browse: 'favorites', user: username },
 			that = this;
 
@@ -1562,6 +1563,7 @@ themes.view.Installer = themes.view.Appearance.extend({
 
 		return wp.ajax.send( 'save-wporg-username', {
 			data: {
+				_wpnonce: nonce,
 				username: username
 			},
 			success: function () {