When creating Issues and Sub-Tasks, we put our time estimates at the Sub-Task level. Is there a way for the totals of the sub-tasks to roll up to the parent Issue? I set my Scrum Rapid Board to show me Original Estimate Time instead of Story Points, but they're all showing up blank because it's the sub-tasks that contain the time estimates. Do you have to manually add up the time estimates and enter them at the parent Issue level?