Thanks for your report! I have confirmed that these fields are missing in 4.6 and our internal build, and have entered a bug report for our developers to look over (UE-5202). I will let you know when I see an update on that. In meantime, these fields still exist in our stable 4.5.1 build. Thanks again!
I am in 4.7.6 and have successfully been able to create Notify Events for animation transitions. After naming event in transition details, you must compile before creating corresponding event node in Event Graph.