Preset loading tuning.

Multi-relay toggle support.
Fire2012 tuning.
2D functions tuning.
Global SPI comments & tuning.
Bugfix in 4LD usermod.

wled00/led.cpp

@@ -63,6 +63,7 @@ void toggleOnOff()
     briLast = bri;
     bri = 0;
   }
+  stateChanged = true;
 }