Cannot display Fahrenheit and Celsius simultaneously

[Jonathan Lee]

In previous versions (before Unity), I could run two weather applets, one for each of Celsius and Fahrenheit. (This is useful if you're from another country, and are trying to learn a new system.)

With Unity, I can only run one instance of the weather indicator, so the indicator should be updated to allow multiple measurement systems.

[Vadim Rutkovsky (roignac)]

We might add this as an option