v23.8.1
- SeePHCalibration timeout
- Rename Mid/Low/High for 1, 2, and 3 point calib's
- Show PHCalibration when escaping with 'D'
- Log whether pH slopes are between 95% and 105%
- Flag warning for bad pH slope
- Handle bad pH slopes, combine slope/points view
- Store "ignore bad calibration" flag in EEPROM