Retract task Complete status

[Adrian-Shobrooke]

Is your feature request related to a problem? Please describe.
I've sometime found that I wrong mark a task completed when it is not. Usually this is after completing a long series of tasks, followed by a partially complete task and muscle memory & stupidity takes over. This issue of incomplete tasks being marked as complete has also been raised during Quality Assurance Working Group meetings. Such incomplete tasks create an additional workload on Validators.

Describe the solution you'd like
Allow the last Mapper of a task to retract the Complete status. Perhaps any Mapper should be able retract a task Complete status if they notice more mapping is required while mapping nearby tasks?

Describe alternatives you've considered
Display a message "Are you sure the task is complete" With Yes/No options to confirm.

It's possible that Mappers may still blindly and in error select 'Yes' and the message may well be seen as intrusive for many task completions. The retraction option is likely the better option to avoid unnecessary user interaction.