When some event for a jid arrive and we want show in roster, always show, even...

When some event for a jid arrive and we want show in roster, always show, even if contact is not in the
roster
Generalize selection of incomming event in the roster
separate add_to_not_in_the_roster() in a func
Deleted a Redraw of parent that seems useless (done in draw_contact())
Fixes #2247.