History: User_Tracker_email_user_field

            Optional (but mandatory to submit the form when applied) ''E-mail'' field for https://profiles.tiki.org/User_Tracker

{CODE(caption=YAML)}
preferences:
 trackerfield_userpreference: y
objects:
 -
  type: tracker_field
  ref: email_user
  data:
   name: $profilerequest:Name for the "E-mail" field:$E-mail$
   tracker: $User_Tracker:user_tracker
   options: email
   type: preference
   visible: creator_editable
   visby: 
    - Admins
   flags:
    - public
    - mandatory
{CODE}