R Shiny: downloadButton styling and icon
<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>