BUG: allow single element bool queries
closes #6148

I see a tiny yellow dot :cry: what happened to the big yellow/red/green banners? I liked those.
 where's the dot?
 It was next to the commit hash, now it's gone ....
 Not totally sure how it's supposed to work.
 I see them now...I think they just take time to show up
 Ok I'm just watching travis
