Allow showing the view of cameras and flybys

[ActuallyaDeviloper]

Currently in level building its a guessing game to make a flyby. You are working with cryptic numeric controls and when you try it in game, the cameras often behave not at all like you thought. This would be a lot easier if you could simulate the view of cameras and flybys in the editor.

For fly bys a time line would need to be displayed to adjust the current view position in the sequence.