Add JS var isRtl to admin-header and remove unused JS localized vars …

…for nav-menu. see #13525.

git-svn-id: http://svn.automattic.com/wordpress/trunk@14999 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin-header.php

@@ -45,7 +45,8 @@
 	typenow = '<?php if ( isset($current_screen->post_type) ) echo $current_screen->post_type; ?>',
 	adminpage = '<?php echo $admin_body_class; ?>',
 	thousandsSeparator = '<?php echo addslashes( $wp_locale->number_format['thousands_sep'] ); ?>',
-	decimalPoint = '<?php echo addslashes( $wp_locale->number_format['decimal_point'] ); ?>';
+	decimalPoint = '<?php echo addslashes( $wp_locale->number_format['decimal_point'] ); ?>',
+	isRtl = <?php echo (int) is_rtl(); ?>;
 //]]>
 </script>
 <?php

wp-includes/script-loader.php

@@ -387,8 +387,6 @@ function wp_default_scripts( &$scripts ) {
 		// Custom Navigation
 		$scripts->add( 'nav-menu', "/wp-admin/js/nav-menu$suffix.js", false, '20100527' );
 		$scripts->localize( 'nav-menu', 'navMenuL10n', array(
-			'home' => _x('Home', 'nav menu home label'),
-			'homeurl' => home_url('/'),
 			'custom' => _x('Custom', 'menu nav item type'),
 			'thickbox' => _x('Edit Menu Item', 'Thickbox Title'),
 			'edit' => _x('Edit', 'menu item edit text'),