Condition List: Voiding/Deleting condition should delete entire history

When you click the delete icon next to a condition in the condition list, it only deletes the most recent instance of that condition.  I would assume that it should delete the condition entirely.

To reproduce:

• Add a new active condition
• Mark that condition as inactive
• Go to the inactive tab and click the "x"
• The condition will be removed from the inactive tab, but when you reload the DB it will appear in the "active" tab
• In the underlying condition table, you'll see two rows for this condition, one for the "active" state and one for the "inactive" state, but only the "inactive" state has been voided.