[FIX] Fixed DATA_ERROR, dhtmlx is not supported datetime formate, Then when render parent task it reduce the hours.
[FIX] Fixed DATA_ERROR, dhtmlx is not supported datetime formate, Then when render parent task it reduce the hours.

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