You can easily add icons to your menu items if you wish. Simply use the Total font_awesome shortcode inside the label with the name of your font awesome icon of choice. Please see the example below taken from the Noveau demo.
You can find a list of the icon class names at FontAwesome.
Icons Without Text – Removing Extra Margin
By default all icons added to the menu have a margin to the right to leave space for any text next to it. However, if you have a menu item that is ONLY an icon without any text it will leave extra space for no reason. To remove this space simply add the “no-icon-margin” to the menu item as shown below: