Regression: wrong font in button, input, optgroup, select, textarea

After upgrading normalize.css in CMS-10695 from v3.0.2 to v6.0.0 we lost a CSS rule that adds font-family: inherit on the button, input, optgroup, select and textarea elements. Since we did not notice this for nearly two months, it is probably wise to validate/test this.

Reproducable in (at least) Chrome and Firefox.