[FIX]fix wrong level and child_id issue after update node.
[FIX]fix wrong level and child_id issue after update node.

akretion/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,akretion/openerp-web,havt/openerp-web