title: How to add id preix for field in activeForm?
body: <p>i have two forms holds the same model attributes, since Yii2 generate the field id to be <em>ModelName-fieldName</em> so the field generated will be as follow:</p>
  
  <pre><code>&lt;select name="Channel[channel]" class="form-control" id="channel-description"&gt;
  </code></pre>
  
  <p>i have tried to use <em>fieldConfig</em> in <em>Activeform</em> but it doesn't add the id to the field itself.</p>