Fix comment and add missing debug statements to demo code

Author: fourstix

firmware/Examples/Advanced/OpenLCD_Qwiic_RGB_Backlight/OpenLCD_Qwiic_RGB_Backlight.ino

@@ -216,6 +216,7 @@ void loop()
   delay(2000);
 
   //Turn on all (white)
+  Serial.println("Setting RGB backlight to white");
   Wire.beginTransmission(DISPLAY_ADDRESS1); // transmit to device #1
   Wire.write('|'); //Put LCD into setting mode
   Wire.write('-'); //Send clear display command
@@ -229,6 +230,7 @@ void loop()
   delay(2000);
 
   //Set to Gray
+  Serial.println("Setting RGB backlight to gray");
   Wire.beginTransmission(DISPLAY_ADDRESS1); // transmit to device #1
   Wire.write('|'); //Put LCD into setting mode
   Wire.write('-'); //Send clear display command

firmware/OpenLCD/OpenLCD.ino

@@ -433,7 +433,7 @@ void updateDisplay()
   }
   else if (modeSetRGB == true)
   {
-    //We get into this mode if the user has sent the correct setting command
+    //We get into this mode if the user has sent the + (43) command to set the backlight rgb values
     rgbData[rgbSpot] = incoming; //Record this byte to the array
 
     rgbSpot++;