Simplified SplineComponent, now a SceneComponent not a PrimitiveComponent
Added support for persisting SplineComp state across CS re-run
SplineComponentVisualizer editing started
[CL 2075479 by James Golding in Main branch]
#proj core
#branch UE4
#summary Removed header groups, removed some redundant includes and replaced with forward declarations. Fixed compilation errors.
[CL 2055361 by Mikolaj Sieluzycki in Main branch]
#proj core
#branch UE4
#summary Removed header groups, removed some redundant includes and replaced with forward declarations. Fixed compilation errors.
[CL 2054304 by Mikolaj Sieluzycki in Main branch]