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)