When live-updating site title in toolbar, fall back to the site url if the title is empty.

props avryl.
see #28682.
Built from https://develop.svn.wordpress.org/trunk@30597


git-svn-id: http://core.svn.wordpress.org/trunk@30587 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/options-general.php

@@ -30,10 +30,11 @@ function options_general_add_js() {
 <script type="text/javascript">
 //<![CDATA[
 	jQuery(document).ready(function($){
-		var $siteName = $( '#wp-admin-bar-site-name' ).children( 'a' ).first();
+		var $siteName = $( '#wp-admin-bar-site-name' ).children( 'a' ).first(),
+			homeURL = ( <?php echo wp_json_encode( get_home_url() ); ?> || '' ).replace( /^(https?:\/\/)?(www\.)?/, '' );
 
 		$( '#blogname' ).on( 'input', function() {
-			var title = $( this ).val();
+			var title = $.trim( $( this ).val() ) || homeURL;
 
 			// Truncate to 40 characters.
 			if ( 40 < title.length ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-beta2-30596';
+$wp_version = '4.1-beta2-30597';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.