Patient modal trigger

[Benhalor]

The firmware should be able to trigger a modal on the UI asking the patient size

I think the best way to do that would be to use the serial protocol in revert mode :
1- the firmware sends a ControlAck for patient_size to the UI with value 0
2- The UI displays a modal asking for patient size
3- The user sets the patient size and click OK
4- The UI sends the patient size to the firmware

[dsferruzza]

Maybe we should keep the current behavior of ControlAck (that is: to acknowledge any setting change asked by the UI), but we could totally introduce a new telemetry message for this usage, right?

[Benhalor]

Yes that what I meant