Issue "Remaining Estimate" does not deduct "Sub-Task" original estimate for Sub-Tasks which are resolved.

When a "Sub-Task" is resolved the full "original estimate" should be deducted from the parent issue "Remaining Estimate" regardless of the "Work log" entries of the "Sub-Task". We don't force our users to enter work logs but we do force them to enter the "original estimate" so we can leverage the timetracking functionality to schedule releases.