Mark the invoice as read when the user get their key, even if they specified no email
Mark the invoice as read when the user get their key, even if they specified no email

Signed-off-by: Jerome Flesch <e2ab02895a0629e3a6277bd1de9e97e6d87ef41e@openpaper.work>

openpaperwork/openpaper.work,openpaperwork/openpaper.work,openpaperwork/openpaper.work