navbar-nav button styling

Created by: jlapolla

As a developer, I want buttons in navbar-nav lists to look awesome, so that I can place buttons in navbar-nav lists, just like links.

Before:

After:

Test with the following HTML:

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>
    <div class="collapse navbar-collapse" id="navbar-collapse">
      <ul class="nav navbar-nav">
        <li><a href="#">Link</a></li>
        <li><a href="#">Link</a></li>
        <li><button type="button" class="btn btn-default navbar-btn">Button</button></li>
        <li><button type="button" class="btn btn-default navbar-btn">Another Button</button></li>
      </ul>
    </div>
  </div>
</nav>