Fixed GroupedChargesGridView to display charges with parent_id referencting charge in other bill
Fixed GroupedChargesGridView to display charges with parent_id referencting charge in other bill

Compensation charges may contain parent_id, but are aggregated to a separate bill,
so the parant charge is not available within this bill and can not be displayed

hiqdev/hipanel-module-finance,hiqdev/hipanel-module-finance,hiqdev/hipanel-module-finance