Revert to Vim because ed is the standard editor

https://www.gnu.org/fun/jokes/ed-msg.html

Author: wvu

lib/msf/ui/console/command_dispatcher/modules.rb

@@ -88,7 +88,7 @@ def cmd_edit(*args)
               editor = local_editor
 
               if editor.nil?
-                editor = 'ed'
+                editor = 'vim'
                 print_warning("LocalEditor or $VISUAL/$EDITOR should be set. Falling back on #{editor}.")
               end