Copilot should only send to active customers by default

We had a few people unsubscribe to a recent email. That's fine, but I recognized one of the companies and realized they were an inactive customer. I'd unsubscribe as well!

We'll go back and double check our powerlists to make sure we filter for active customers only, but I think that should be a default filter that I need to disable, rather than one that the team needs to remember and explicitly remember.