Improve update request history

Tobias Lauer

Our customer has set-up update requests being sent out every day if the task is not yet closed. This results in multiple requests and if the recipient updated the last one only that request becomes complete while the other are still in a pending status in the update request history. This can cause confusion to the sheet owner. 

Requirement or idea: It would be a nice improvement to consolidate the update request history log if multiple request are sent for the same corresponding row.