title: Add icon to child context menu
body: <p>I want to add an icon to my child context menus. But right now, the chrome extension <a href="http://code.google.com/chrome/extensions/contextMenus.html#method-create" rel="noreferrer">options for context menu</a> doesnt provide any option to add icon while creating a child menu.<br>
  I can add icon to the parent menu <a href="http://code.google.com/chrome/extensions/contextMenus.html#manifest" rel="noreferrer">using the icon parameter in manifest file</a>. But no option for the child menu.<br>
  Any idea how I might achieve this?</p>