- Caching: also prevent caching in AjaxHandler

- Util: initialize enchantments even if it has no usable stats
- NPCs:
 * added tamability to infobox
 * added pet-spells to controlled spells tab
 * fixed displaying texts for zero-length strings, also
   adapted TrinityCore:master/e567ab95972508adc85a36f867723114a04fe227
 * hide listview column 'type', when displaying one specific type
- Utility - missing-screenshots: reduced list-size to 200
- fixed copypasta-typo in locale_eses.js
- Skill: fixed error in detail page title

includes/ajaxHandler.class.php

@@ -30,6 +30,13 @@ class AjaxHandler
         if (!$what || !method_exists($this, $f))
             return null;
 
+        // see GenericPage::display()
+        header('Expires: Sat, 01 Jan 2000 01:00:00 GMT');
+        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+        header('Cache-Control: no-store, no-cache, must-revalidate');
+        header('Cache-Control: post-check=0, pre-check=0', false);
+        header('Pragma: no-cache');
+
         return $this->$f();
     }