USER STORY: Outdated tasks shouldn't be visible in the list of tasks

[josipcodes]

As an admin, I can avoid having to manually delete outdated tasks so that I save time.

[josipcodes]

This user story needs a hands-on approach to avoid inconvenience to the user.

Potential risks:

1. Helper has fulfilled the task but owner didn't get a chance to mark it as done before deletion.
2. Owner wanted to update the deadline as circumstances changed, but now they need to create a new task.

Factors to take into account:

1. Scoping the amount of tasks which are left not resolved within the deadline to see if we are really saving admin's time while not jeopardizing user experience.