Disable 1D/2D mapping for individual pixel control

wled00/json.cpp

@@ -211,6 +211,9 @@ void deserializeSegment(JsonObject elem, byte it, byte presetId)
 
   JsonArray iarr = elem[F("i")]; //set individual LEDs
   if (!iarr.isNull()) {
+    uint8_t oldMap1D2D = seg.map1D2D;
+    seg.map1D2D = M12_Pixels; // no mapping
+
     // set brightness immediately and disable transition
     transitionDelayTemp = 0;
     jsonTransitionOnce = true;
@@ -254,6 +257,7 @@ void deserializeSegment(JsonObject elem, byte it, byte presetId)
         set = 0;
       }
     }
+    seg.map1D2D = oldMap1D2D; // restore mapping
     strip.trigger(); // force segment update
   }
   // send UDP/WS if segment options changed (except selection; will also deselect current preset)