title: window.open not loading tab properly
body: <p>I'm trying to make a feature where clicking on a button will load a window in a new tab. 
  For some reason, this is not working.</p>
  
  <p>In my HTML, I have</p>
  
  <pre><code>&lt;button onClick="myFunction"&gt; Try it &lt;/button&gt;
  </code></pre>
  
  <p>and the corresponding function is</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  
      function myFunction() {
          window.open("http://localhost:9000/", "_blank");
      }
  &lt;/script&gt;
  </code></pre>
  
  <p>For some more details, this is being done from a widget on Team Foundation Server and I'm trying to load a SonarQube page.
  <a href="https://i.stack.imgur.com/rzLAT.png" rel="nofollow noreferrer">This</a> is what the page should look like, 
  but when I try to access it with the above code it just loads a blank page. However, the proper favicon is there.
  If I load my HTML page normally (not on Team Foundation Server), clicking the button loads the page properly, so I think it has something to do with Team Foundation Server, but I have no clue what.</p>
  
  <p>Any help would be greatly appreciated.</p>
  
  <p>Thanks!</p>