Enable box when it is configured from serial.

src/open-led-race.ino

@@ -548,6 +548,7 @@ ack_t parseCommands(AsyncSerial &serial) {
     if( err ) return ack;
     EEPROM.put( eeadrInfo, tck.cfg );
     
+    box_init( &tck );
     ack.rp = OK;
     if ( verbose >= DEBUG ) { //VERBOSE
       struct cfgtrack const* cfg = &tck.cfg.track;