title: tooling_sidebar.yml collapses when accessing certain pages
body: <p>I am using Jekyll with GitHub pages (kramdown markdown) and am having issues with the sidebar collapsing when accessing certain pages within sub folders.  Been staring for a while.</p>
  <p>Here is my .yml code:</p>
  <pre><code>- title: IQ
      output: web
      folderitems: 
  
      - title: Set up Git and Logging Bugs
        url: /set_up_git_logging_bugs.html
        output: web
        subfolders:
  
        - title: How To
          output: web
          subfolderitems:
  
          - title: Install IQ on a Test Machine
            url: /set_up_iq_machines.html
            output: web
  
          - title: Connect to an IQ Linux Machine
            url: /connect_to_linux_machines.html
            output: web
  
  
        - title: Processes
          output: web
          subfolderitems:
  
          - title: Run dbtest
            url: /run_dbtest.html
            output: web
  
          - title: SP or PL Testing
            url: sp_pl_testing.html
            output: web
  
          - title: MPX Testing
            url: mpx_testing.html
            output: web
  </code></pre>
  <p>The two pages are the last two. Clicking on Run dbtest does not collapse the sidebar.</p>
  <p>What I have tried:</p>
  <ul>
  <li>The <strong>show all characters in Notepad++</strong> to ensure that there are no extra spaces</li>
  <li>Changed the subfolderitems under processes to subfolders</li>
  </ul>