fix(targetchange): bad url when delete an actor

close #1607

Signed-off-by: Thierry Bugier <tbugier@teclib.com>

Author: btry

inc/targetbase.class.php

@@ -1715,7 +1715,8 @@ public function post_addItem() {
    protected static function getDeleteImage($id) {
       global $CFG_GLPI;
 
-      $link  = ' &nbsp;<a href="' . $CFG_GLPI['root_doc'] . '/plugins/formcreator/front/targetticket.form.php?delete_actor=' . $id . '">';
+      $formUrl = static::getFormURL();
+      $link  = ' &nbsp;<a href="' . $formUrl . '?delete_actor=' . $id . '">';
       $link .= '<img src="../../../pics/delete.png" alt="' . __('Delete') . '" title="' . __('Delete') . '" />';
       $link .= '</a>';
       return $link;