Plot Sensors' Outdoor temperature on right Y-Axis

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Problem: Clicking to add the Outdoor Temperature line to the Sensor Detail page results on the sensor data being squashed in the 25-19C range when the outdoor temperature is not in the same ballpark as the indoor temperature. For example -5C causes the min/max values on the graph to be -10C and 30C. With the outdoor temperate at -20 the min and max values of the Y-axis are 40C and -40C