Replace Chosen jQuery plugin by custom UI component

app/Template/group/associate.php

@@ -9,7 +9,11 @@
         <?= $this->form->hidden('group_id', $values) ?>
 
         <?= $this->form->label(t('User'), 'user_id') ?>
-        <?= $this->form->select('user_id', $users, $values, $errors, array('required'), 'chosen-select') ?>
+        <?= $this->app->component('select-dropdown-autocomplete', array(
+            'name' => 'user_id',
+            'items' => $users,
+            'defaultValue' => isset($values['user_id']) ? $values['user_id'] : null,
+        )) ?>
 
         <div class="form-actions">
             <button type="submit" class="btn btn-blue"><?= t('Save') ?></button>