Urls on feeds_tamper_ui_list_form() start with slash

Link start with slash. Now all links start from server root, even if $base_url is set in settings.php.

In feeds_tamper_ui.admin.inc
line #61

$add = '/admin/structure/feeds/' . check_plain($importer->id) . '/tamper/add/' . check_plain(rawurlencode($i));