i18n: Make form management more relevant

References:
(Requires Crowdin account)
http://i18n.osticket.com/translate/osticket-official/148/enus-de#3852

include/staff/templates/form-manage.tmpl.php

@@ -35,7 +35,7 @@ foreach ($forms as $e) { ?>
     );
     $sel.prop('disabled',true);">
 <option selected="selected" disabled="disabled"><?php
-    echo __('Add a new form to this ticket'); ?></option>
+    echo __('Add a form'); ?></option>
 <?php foreach (DynamicForm::objects()->filter(array(
     'type'=>'G')) as $f
 ) {