[mm] Update disconnected display on connect failure to show err
[mm] Update disconnected display on connect failure to show err

CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter