Anyway I have an UX improvement suggestion for the Option Field sidebar. I think sometimes I spend too much time to find a field I'm searching for. I think a live search in the top of fields filter will help speeding up field finding process. Please see the attachment to see what I mean. Would it be possible to implement this?
Update : Looks like we can't embed .gif file in the forum post, so I uploaded it to imgur here : http://imgur.com/a/7SK35