[hm] Fix possibility of being locked in startup mode when entering manual output mode
[hm] Fix possibility of being locked in startup mode when entering manual output mode

Thanks Phillip P for finding this bug!

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