Turning off manual watering that was triggered from device doesn't work

[vanstinator]

If you toggle a manual watering session from the hose adapter itself you can't actually turn it off from this library. I think it's technically a Melnor quirk with the web platform. If you load the web UI the dropdown box for the active watering zone is off. The only way to use the UI to turn this state back off is to pick an arbitrary time from the selector and then turn the zone back off. We can probably mimic this behavior ourselves to make the API handle this transparently.