get-additional-important-urls in drscheme:frame:basics-mixin

Each string in the result of this method is added as a menu item to DrScheme's ``Related Web Sites'' menu item. The first string is the name of the menu item and the second string is a url that, when the menu item is chosen, is sent to the user's browser.

• (send a-drscheme:frame:basics-mixin get-additional-important-urls) -> (listof (list string string))

  Defaultly returns the empty list.