fix: page['items'] for favorites category and remove old use of $has_next,
$has_prev in picture.php (slideshow and favorites section)
optimization: one less sql query in picture.php when there are no comments
display of the refresh url in redirect.tpl (useful when debugging with
browser meta redirects disabled)
git-svn-id: http://piwigo.org/svn/trunk@1041 68402e56-0260-453c-a942-63ccdbb3a9ee
