Allow users outside US to see graph page dimension in mm
In graph (Plot Details) Print/Dimensions Tab, the default value of the Units is Window(unit), which will be altered according to Windows: Customize Format: Measurement system:U.S./Metric.(To set this value, click Control Panel\Clock, Language, and Region,\Formats tab\Additional Settings.) Specifically, for United State and Great Britain, the default value would be Window(inch); for the rest of the world, the default value is Window(mm)
