anchor.diff:        Notebook downloads
       <% end %>
     </li>
  -  <li>
  -    <%= link_to privacy_policy_path do %>
  -      <i class="material-icons left">verified_user</i>
  -      Privacy policy
  -    <% end %>
  -  </li>
  -  <li class="divider"></li>
     <li>
       <%= link_to destroy_user_session_path do %>
         <i class="material-icons left">power_settings_new</i>
  
positive.code: <ul id="desktop-user-dropdown" class="dropdown-content">
    <% if current_user %>
      <li>
  
negative.code: 
        <ul class="right">
          <% if user_signed_in? %>
          <li>
            <a class="dropdown-button tooltipped" href="#!" data-activates="help-dropdown" data-position="bottom" data-delay="100" data-tooltip="Need help?">
              <i class="material-icons">help</i>
            </a>
          </li>
          <li>
            <a class="dropdown-button tooltipped" href="#!" data-activates="desktop-user-dropdown" data-position="bottom" data-delay="100" data-tooltip="Your content">
              <div class="hide-on-med-and-up"><i class="material-icons">book</i></div>
  