[IMP] invoice from order line to invoice should propose to group invoice...

Hello
Task link:-
https://www.odoo.com/web#id=6881&view_type=form&model=project.task&menu_id=3942&action=327

Pad link:-
https://pad.odoo.com/p/r.37vmFtbpHZgHobXz

I have done the following changes:
    When invoicing policy = Invoice on sale order line, the wizard to create invoice from order line to invoice should propose to group invoices by partner.

Thanks.
avo