title: Fluent ui nortstar increase the size of icons
body: <p>How do we override the styles of the icon ?. (apart from the size props of icon size=&quot;largest&quot;)
  tried the below :</p>
  <pre><code>const myTheme: ThemeInput = {   componentStyles: {   EmojiSadIcon
      : {
            root: {
              width:100,
              height:100
            },
        }   }}
  </code></pre>
  <p>as well tried to give in styles</p>