Inactive timers should publish '0' to backend when deleteTimers == false. When the list is empty no value is sent to the backend ending up with gaps in the reported values.
Even when deleteTimers is set to false, inactive timers are not reported
as "0". This is because timers calculations detects the timer values length.
So to make the inactive timers report '0' when deleteTimers==false, we set
the values to a '' instead of empty list.
I think it makes sense to have that work the same way the other ones do. Could you also update the tests for this please?