title: Add Context Menu command in Atom.io
body: <p>I'm trying to add a context menu command to the Atom editor so that I can easily toggle bookmarks.  I added the following to my <code>config.cson</code> file:</p>
  
  <pre><code>"context-menu":
    "atom-text-editor":
      Bookmark: "bookmarks:toggle-bookmark"
  </code></pre>
  
  <p>I restarted Atom and right-clicked on a line of code, but the context menu hadn't changed.  Is there something else that I have to do?  (I've tried Atom on Windows 7 and Ubuntu 14, but neither update the context menu.)</p>