Resouce Affectation

idResource is always set.
It is the id in the table resource, whatever the personn is a resource, a user or a constact.
If personn allocated is a contact, idContact is set.
If personn allocated is a user, idUser is set.
If personn allocated is a resource, idResourceSelect is set.
(it is historical that idResource is the always set field, so we had to rename idResourceSelect for selected resource)

if (SqlList::getNameFromId('Resource', $this->idResource) == $this->idResource) {
$this->idResource = null;
}

This wa shistorically used to reset idResource if it's not a resource. It will be re-calculated on control() function.

If id is returned , it means name has not been found