Prevent materializecss dropdown to close when clicking inside it
<p>I am using Materialize.css for current project, and I have dropdown with some input forms inside it. </p>

<p>Dropdown has option to close by:</p>

<ul>
<li>clicking outside of <code>.dropdown-content</code></li>
<li>clicking inside of <code>.dropdown-content</code></li>
<li>clicking on <code>.dropdown-button</code></li>
</ul>

<p>What I need is to <strong>not close</strong> when clicking inside of it, because i need to be able to fill in input forms and other actions.</p>

<p>Here is simple <a href="http://codepen.io/anon/pen/RGxAwG" rel="nofollow">example</a></p>