Details: multi-parameter components (RigidBody/Joint/CharacterController/
Animation) now use SeparatorText category headers in UE Details style;
all parameter labels normalized to Pascal Case.
Stats: rearranged into View / Scene / Rendering / Physics / Performance
collapsing groups. Clear Color moved to Scene, Debug View to Rendering,
GPU Timings + Frame merged into Performance; bare top-level widgets and
the now-obsolete Environment group removed.