Diverging from hardware, allowing a group to have 2 active loop segments by holding each segment button individually rather than both together (or using abLoop mode)

Was abusing legacy match from when using a triangle oscillator for the light levels

Using simpler sine oscillators for flashing lights that can render with a phase offset.

Cleaning up warnings.

addChild for setting faceplate graphics is changed to ModuleWidget's
setPanel method to reflect the usual approach to setting SVG graphics for
the faceplate.

In Tides, addChild is still used so that the faceplate
can be switched between Tides and Sheep as needed.