TE2 Filtering Mode Feature Parity

(Sorry if i missed any existing feature request in my search - I see #1026 addresses the other functionality components) Navigating large models can be a chore. I miss the TE2 filtering mode options to be flip between parent, child, and flat searches. I think that TE2's implementation was great. Some hotkey options would be a nice to have though. - Less cluttered search results in larger models