Visualize "Work completed" on Capacity report breakout

The breakdown of records for a given month on the Capacity report shows "Capacity", "Planned", and "Available" metrics, in addition to user and team velocity.

The "Available" metric uses (Capacity - (Planned + Complete)) to calculate, at least on the "parallel planning" view. However, the "Complete" metric is not visible, so the numbers do not make immediate sense if some work is already in progress.

This can be confusing, as some teams might be expecting that value to be incorporated into the Planned number, or otherwise want to be able to check the calculation at a glance.

Add an additional "Complete" or "Work Done" section in that breakout showing the work already logged.