Split the Start/End Date & Time between Assignee and Approvers

The start date & time and the end date & time relates to all users - assignee and all the approvers.

It would be better to have an option to split it between the assignee and the approvers.

That way the assignee is off the hook when the work is done, it just needs to be reviewed by the approvers.

Then the status could show that the task is completed for the assignee but is still opened for the approvers. Possibly have a new icon when this state is present.