How do I create menu link icons? I noticed that when I added a new menu link, an icon is now show like groups, events, etc. How do I add an icon for that menu link item?
You can use menu icons module to generate icon for the menu item.


  This module allows you to upload an image in the menu-item's
  configuration form.
  
  After uploading the image, the icon data will be added to the menu
  link's options array.
  
  When a menu link is goes through the theme layer, it will receive an
  extra class which by default is used to attach the images as a
  background image to the corresponding menu item.