Change hidden h1 heading should always be the site name

htdocs/lib/web.php

@@ -332,7 +332,7 @@ EOF;
 
     $sitename = get_config('sitename');
     $smarty->assign('title', $sitename);
-    $smarty->assign('heading', $sitename);
+    $smarty->assign('hiddenheading', $sitename);
 
     if (defined('PUBLIC')) {
         $smarty->assign('PUBLIC', true);

htdocs/theme/default/templates/header.tpl

@@ -81,7 +81,7 @@
 
                 
                 <div id="logo"><a href="{$WWWROOT}"><img src="{theme_path location='images/logo_mahara.gif'}" border="0" alt=""></a></div>
-                <h1 class="hidden"><a href="{$WWWROOT}">{$heading|default:"Mahara"|escape}</a></h1>
+                <h1 class="hidden"><a href="{$WWWROOT}">{$hiddenheading|default:"Mahara"|escape}</a></h1>
             </div>
         </div>
         <div id="mainwrapper">

htdocs/theme/default/templates/microheader.tpl

@@ -41,7 +41,7 @@
             <div id="header">
                 <div class="frX"></div>
                 <div id="logo"><a href="{$WWWROOT}"><img src="{theme_path location='images/logo_mahara.gif'}" border="0" alt=""></a></div>
-                <h1 class="hidden"><a href="{$WWWROOT}">{$heading|default:"Mahara"|escape}</a></h1>
+                <h1 class="hidden"><a href="{$WWWROOT}">{$hiddenheading|default:"Mahara"|escape}</a></h1>
             </div>
         </div>
         <div id="mainwrapperX">