message: Change default params in DEV_MODE_comms_handler.
  The old params -- PIP 30 PEEP 10 -- were hard for us to meet, and thus
  complicated testing.
  GPC: default-dev-mode-params
diff: @@ -81,10 +81,10 @@ static GuiStatus gui_status = GuiStatus_init_zero;
  // and graphed by e.g. the Arduino IDE (tools -> serial plotter).
  static void DEV_MODE_comms_handler() {
  gui_status.desired_params.mode = VentMode_PRESSURE_CONTROL;
  - gui_status.desired_params.breaths_per_min = 10;
  - gui_status.desired_params.peep_cm_h2o = 10;
  - gui_status.desired_params.pip_cm_h2o = 30;
  - gui_status.desired_params.inspiratory_expiratory_ratio = 2;
  + gui_status.desired_params.breaths_per_min = 12;
  + gui_status.desired_params.peep_cm_h2o = 5;
  + gui_status.desired_params.pip_cm_h2o = 15;
  + gui_status.desired_params.inspiratory_expiratory_ratio = 0.66;
  static Time last_sent = Hal.now();
  Time now = Hal.now();
  