<div class="navbar navbar-inverse toolbar-waterfall doc-navbar" id="{{ site.id.navbar }}">
  <button aria-controls="{{ site.id.navdrawer }}" aria-expanded="false" aria-label="Toggle Navdrawer" class="navbar-toggler hidden-lg-up" data-target="#{{ site.id.navdrawer }}" data-toggle="navdrawer" data-type="permanent">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand hidden-lg-up" href="{{ site.baseurl }}/index.html">{{ site.title }}</a>
</div>

<div class="navbar navbar-inverse toolbar-waterfall doc-navbar" id="{{ site.id.navbar }}">
  <button aria-controls="{{ site.id.navdrawer }}" aria-expanded="false" aria-label="Toggle Navdrawer" class="navbar-toggler hidden-lg-up" data-target="#{{ site.id.navdrawer }}" data-toggle="navdrawer" data-type="permanent">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand hidden-lg-up mr-auto" href="{{ site.baseurl }}/index.html">{{ site.title }}</a>
</div>

Update doc navbar markup to work with latest BS4 changes
Update doc navbar markup to work with latest BS4 changes
