title: Opening link in new tab from Polymer Modal
body: <p>Hi just a very simple question. I have a Modal in my Polymer 3 page. I want to add a link in the model and open the link in new Tab, but its not working. The link opens in the same window, where the popup is opened?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
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  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html&gt;
    &lt;div class="modal--innerContainer"&gt;
       &lt;div&gt;
          &lt;h3&gt;${item.title}&lt;/h3&gt;
          &lt;p&gt;${item.content}&lt;/p&gt;
          &lt;a href="#" target="_blank"&gt;Read more&lt;/a&gt;
       &lt;/div&gt;
       &lt;button on-click="${() =&gt; this._closeModal()}"&gt;Close&lt;/button&gt;
    &lt;/div&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>