title: Yii2 - Submit Active-form only on click over submit button, not at pressing enter key
body: <p>I'm working in an active form and adding some fields dynamically using a <code>GridView</code>, but when I have to filter data and I press the enter key (on <code>GridView</code> to begin filtering) the form is submitted.</p>
  
  <p>How to avoid "submitting" on press Enter key?</p>