Allow grouped time entries on 'sent' and 'paid' invoices to be clickable

When an invoice is in the draft state it's possible to click on a grouped time entry and see the timeslips that comprise the entry. Once an invoice has been sent it's no longer possible to do this, however you can make it draft again. Paid invoices can't be moved to draft though.

Is it possible to allow grouped time entries on sent and paid invoices to be clickable in the same way that draft ones are?