Missing save button during calibration

Is there a way we can save the 'port' name without redoing the calibration. The SO-101 is using serial and thus sometimes the port name can change upon disconnecting. Right now the only way to update the port name is redo the calibration.

Start at the calibration screen shown in the issue and reproduce a serial disconnect that changes the SO-101 port name. Trace where the port value is held and how calibration is saved; done means the port can be updated and saved without repeating calibration.

Written by the indexing model from the issue text.