QuickSearch: implement it as a trait

library/Director/Web/Controller/Extension/QuickSearch.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Controller\Extension;
+
+use ipl\Html\Html;
+
+trait QuickSearch
+{
+    public function quickSearch()
+    {
+        $search = $this->params->get('q');
+
+        $form = Html::tag('form', [
+            'action' => $this->getRequest()->getUrl()->without(array('q', 'page', 'modifyFilter')),
+            'class'  => ['quicksearch', 'inline'],
+            'method' => 'GET'
+        ]);
+
+        $form->add(
+            Html::tag('input', [
+                'type' => 'text',
+                'name' => 'q',
+                'value' => $search,
+                'placeholder' => $this->translate('Search...'),
+                'class' => 'search'
+            ])
+        );
+
+        $this->controls()->add($form);
+
+        return $search;
+    }
+}