Moved settings from preprocessor directives to variables. Also added a way to (for now only) display them via HTTP server.

src/effect_confetti.cpp

@@ -5,7 +5,7 @@
 
 void ConfettiEffect::loop(uint16_t ms) {
 	window->fadeToBlackBy(3);
-	for (int i=0; i<EFFECT_CONFETTI_PIXELS_PER_LOOP; i++) {
+	for (int i=0; i<settings.effects.confetti.pixels_per_loop; i++) {
 		CRGB color = _getColor();
 		window->addPixelColor(random16(LED_COUNT), &color);
 	}