code: def update_data_display(self, data):
          
          acc_cal = self.ACC_TIMESTAMP in data
          mag_cal = self.MAG_TIMESTAMP in data
          gyro_cal = self.GYRO_TIMESTAMP in data
  
          uncal = 'QLineEdit {background-color: #cc3333;};'
          cal = 'QLineEdit {background-color: #33cc33;};'
  
          if acc_cal:
              self.dataAccX.setStyleSheet(cal)
              self.dataAccY.setStyleSheet(cal)
              self.dataAccZ.setStyleSheet(cal)
          else:
              self.dataAccX.setStyleSheet(uncal)
              self.dataAccY.setStyleSheet(uncal)
              self.dataAccZ.setStyleSheet(uncal)
  
          if gyro_cal:
              self.dataGyroX.setStyleSheet(cal)
              self.dataGyroY.setStyleSheet(cal)
              self.dataGyroZ.setStyleSheet(cal)
          else:
              self.dataGyroX.setStyleSheet(uncal)
              self.dataGyroY.setStyleSheet(uncal)
              self.dataGyroZ.setStyleSheet(uncal)
  
          if mag_cal:
              self.dataMagX.setStyleSheet(cal)
              self.dataMagY.setStyleSheet(cal)
              self.dataMagZ.setStyleSheet(cal)
          else:
              self.dataMagX.setStyleSheet(uncal)
              self.dataMagY.setStyleSheet(uncal)
              self.dataMagZ.setStyleSheet(uncal)
docs: Triggered when the selected device/IMU is changed. Updates the background
          colours of the text widgets in the UI to indicate which sensors have calibration
          data available (green) and which do not (red)