The camera key control routine now accumulates angular and positional velocity, and applies them per frame. There is also a friction component to reduce and then clear them over a few frames. This feels a lot closer to "noclip" movement, and allows mappers to navigate more precisely, which makes selecting brushes and faces in intricate areas much easier. YouTube preview of the movement here: https://www.youtube.com/watch?v=oiKwr3w0o5c
