ABL milliamps no longer hardcoded to 850 at runtime (#2581)

wled00/FX.h

@@ -609,7 +609,7 @@ class WS2812FX {
       _brightness = DEFAULT_BRIGHTNESS;
       currentPalette = CRGBPalette16(CRGB::Black);
       targetPalette = CloudColors_p;
-      ablMilliampsMax = 850;
+      ablMilliampsMax = ABL_MILLIAMPS_DEFAULT;
       currentMilliamps = 0;
       timebase = 0;
       resetSegments();

wled00/const.h

@@ -292,7 +292,13 @@
   #endif
 #endif
 
+#ifndef ABL_MILLIAMPS_DEFAULT
   #define ABL_MILLIAMPS_DEFAULT 850  // auto lower brightness to stay close to milliampere limit
+#else
+  #if ABL_MILLIAMPS_DEFAULT < 250  // make sure value is at least 250
+   #define ABL_MILLIAMPS_DEFAULT 250
+  #endif
+#endif
 
 // PWM settings
 #ifndef WLED_PWM_FREQ