title: add icon (font-awesome) to trackbacks & pingbacks
body: <p>Maybe is a simple question, but I'm trying to add an icon for tracbacks and pingbacks in my comment page of wordpress. If every comment have an user avatar I wanna each tracback and pingback have same font-awesome icon like avatar user.</p>
  
  <p>Is this posible? Anybody know how to do it?</p>
  
  <p>As always, thanks in advance</p>