How to position the LeftNav to not cover the AppBar

Before this PR I could easily move my LeftNav down to not cover the AppBar by applying a 'top' attribute to the components style. Now that this PR applies the style to the root element this no longer works and the LeftNav is full-height. Is there a way to style the root element to get the LeftNav down again ? (applying the top-style to the root element does not work because the inner LeftNav has inline styles of 'position: fixed and top: 0')