title: R Shiny: downloadButton styling and icon
body: <p>Is there a way to change the icon or at least control the padding of the downloadButton in Shiny?</p>
  
  <p>I've already tried setting the class:</p>
  
  <pre><code>downloadButton("html_link", label = NULL, class = "download_this")
  </code></pre>
  
  <p>Then in CSS:</p>
  
  <pre><code>.download_this{
      height:40px;
      width:57px;
      color:blue;
      padding-top: 3 !important;
  }
  </code></pre>
  
  <p>This changes the size and color, however for some reason the padding doesn't work on the icon and it appears too high on the button.</p>