I was looking into adding awesome-font icons instead of conversations, and Alerts Edit: Cause I realized after making this post I'm using awesome-fonts for the icons on my forum... was just really tired and forgot -_-
Ah. Those are not default XenForo thingy so it's a bit tricky if you want to have them in WordPress. The top bar is a bit hard to customize, you may need a designer to do that I'm afraid.