title: How to remove focus from button after closing the "altertify" confirm modal?
body: <p>I have a button with <code>:hover</code> and <code>:focus</code> css property. While hovering on it the color changes to red.
  Now when i click on it a Alertify confirm box appears and then i press ok or cancel the color changes to red again because of <code>:focus</code> property.
  How can i unbind <code>:focus</code> when clicked on ok or cancel.</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
      &lt;script src="https://cdn.jsdelivr.net/alertifyjs/1.8.0/alertify.min.js"&gt;&lt;/script&gt;
      &lt;link rel="stylesheet" href="https://cdn.jsdelivr.net/alertifyjs/1.8.0/css/alertify.min.css"/&gt;
      &lt;link rel="stylesheet" href="https://cdn.jsdelivr.net/alertifyjs/1.8.0/css/themes/default.min.css"/&gt;
  
  &lt;/head&gt;
  
  &lt;style&gt;
  .btn-test:hover,.btn-test:focus{
  background-color:red;
  }
  &lt;/style&gt;
  
  &lt;body&gt;
  
  
  &lt;button class="btn-test"&gt;Click Me&lt;/button&gt;
  
  
  &lt;/body&gt;
  
  &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"&gt;&lt;/script&gt;
  
  &lt;script&gt;
  $(".btn-test").click(function(){
  
   alertify.confirm('Confirmation', 'You clicked', function () {
                  //do nothing
              }
              , function () {
                  //do nothing
              });
  
  });
  &lt;/script&gt;
  
  &lt;/html&gt;
  </code></pre>