Create handle on non sanitized value

We must never create handle on sanitized value since it will create
weird stuff. The creatHandle() function good to deal with un-sanitized
data since it will remove anything that is dangerous.

Fixes #82

fields/field.selectbox_link.php

@@ -625,7 +625,7 @@ public function appendFormattedElement(XMLElement &$wrapper, $data, $encode = fa
 
                 $item = new XMLElement('item');
                 $item->setAttribute('id', $relation['id']);
-                $item->setAttribute('handle', Lang::createHandle($relation['value']));
+                $item->setAttribute('handle', Lang::createHandle(General::reverse_sanitize($relation['value'])));
                 $item->setAttribute('section-handle', $relation['section_handle']);
                 $item->setAttribute('section-name', General::sanitize($relation['section_name']));
                 $item->setValue($relation['value']);