Created by: tagliala
According to the docs, you just need to apply the navbar-nav to an
<ul> tag in a list-based navbar. In fact, navbar-nav seems to
override all the css properties set by nav.
Also, nav-item class should be used only for <li> tags, or in
conjunction with <a> tags to entirely avoid the list-based approach.
This commit removes the redundant nav class from navbar-nav <ul>
tags, moves nav-item from <a> tags to <li> tags and properly
adds nav-item class to <li> tags where missing.
Refs: