Non icon buttons in Playground have extra left padding

[sharath-sriram]

What?

Buttons in the playground of our documentation site show a little extra padding when there is no icon.

Why?

This is because the nucleus-icon class is activated even in the absence of the icon, hence triggering the CSS. We are using a nucleus-icon--none class specifically for playground but the CSS is still targeting the presence/absence of nucleus-icon class. We need a workaround.