TODO 

 * parameter to show other fields than email in autocompletion list (Name, Address, ...)
 * add other auto completion fields (link ticket with completion on subject)
 * add a context menu in tickets list to link directly to ticket subsections

DONE

 * enable/disable Completion for SelfService
 * add completion against LDAP
 * optimisation to match privileged/unprivileged criteria (faster than the if ... elsif ... else inside the loop)