Fixed issue #18287: Question List: Filtering doesn't work on type des…

…cription (#2597)

application/models/Question.php

@@ -1056,13 +1056,18 @@ public function search()
         $criteria->compare("t.sid", $this->sid, false, 'AND');
         $criteria->compare("t.parent_qid", 0, false, 'AND');
         //$criteria->group = 't.qid, t.parent_qid, t.sid, t.gid, t.type, t.title, t.preg, t.other, t.mandatory, t.question_order, t.scale_id, t.same_default, t.relevance, t.modulename, t.encrypted';
-        $criteria->with = array('group' => array('alias' => 'g'), 'questionl10ns' => array('alias' => 'ql10n', 'condition' => "language='" . $this->survey->language . "'"));
+        $criteria->with = [
+            'group' => ['alias' => 'g'],
+            'questionl10ns' => ['alias' => 'ql10n', 'condition' => "language='" . $this->survey->language . "'"],
+            'question_theme' => ['alias' => 'qt', 'condition' => "extends=''"]
+        ];
 
         if (!empty($this->title)) {
             $criteria2 = new CDbCriteria();
             $criteria2->compare('t.title', $this->title, true, 'OR');
             $criteria2->compare('ql10n.question', $this->title, true, 'OR');
             $criteria2->compare('t.type', $this->title, true, 'OR');
+            $criteria2->compare('qt.description', $this->title, true, 'OR');
             /* search exact qid and make sure it's a numeric */
             if (is_numeric($this->title)) {
                 $criteria2->compare('t.qid', $this->title, false, 'OR');