Ability to alter time window for time charge invoices at an invoice (or project level) rather than sub-task

Hi

The default time charge for projects and when we do we will typically charge for time that is up to the week before we send the invoice.

When we have multiple sub-tasks , every single one resets to the previous month each time.

It would be beneficial to be able to toggle time window in the main invoice - so all time charges are then identified within the same window automatically.

Thanks