Move overlay to the footer - used in various files

include/staff/footer.inc.php

@@ -12,5 +12,6 @@ if(is_object($thisstaff) && $thisstaff->isStaff()) { ?>
 <?php
 } ?>
 </div>
+<div id="overlay"></div>
 </body>
 </html>

include/upgrader/upgrade.inc.php

@@ -31,7 +31,6 @@ $action=$upgrader->getNextAction();
             <p>3. We can help, feel free to <a href="http://osticket.com/support/" target="_blank">contact us </a> for professional help.</p>
     </div>
     <div class="clear"></div>
-    <div id="overlay"></div>
     <div id="loading">
         <h4><?php echo $action; ?></h4>
         Please wait... while we upgrade your osTicket installation!