title: Sublime sidebar create a custom menu
body: <p>Is there some way to add a new menu to the sidebar? </p>
  
  <p>Right now, I have the following menus in the sidebar:</p>
  
  <ul>
  <li>OPEN FILES</li>
  <li>FOLDERS</li>
  </ul>
  
  <p>Would it be possible to add a new custom menu above those two that would then have multiple child-menus? These child-menus would be used to run various commands or scripts that would manipulate the selected text or the currently open file.</p>
  
  <p>For example:</p>
  
  <ul>
  <li>MY CUSTOM MENU 
  
  <ul>
  <li>Sort selected text</li>
  <li>Insert gibberish text</li>
  <li>Open command prompt</li>
  </ul></li>
  <li>OPEN FILES</li>
  <li>FOLDERS</li>
  </ul>