The legacy 2D visualizer now supports customizable bar and peak dot
colors, and renders a grid and labels in the windowed mode.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
For legacy systems that do not support Metal. The Metal SceneKit view
does work on even 10.13.6, if a Metal GPU is present in the system.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>