(This is my first time using IcoMoon.)
Looking at the navigation menu of my demo site:
http://www.millermosaicdemo.com/The IcoMoon icons aren't displaying.
You can see the icon for Contact. This is not IcoMoon -- it's from an icon font that comes with the theme. To get the icon there, because of how WordPress works, I just put the CSS class name modernpicrograms-icon-39 in the CSS Classes spot on the menu item.
So I created the font on IcoMoon, downloaded it, and tried to duplicate how the theme handles its other icon fonts. I put the fonts files in a folder labeled "icomoon" and that folder where the other fonts are. And I added CSS to the theme's fonts.css
I've attached the fonts.css file. The font family ModernPictogramsNormal is what came with the theme and is working. The font family Haven is what I added.
What am I doing wrong?