[Qt-interest] Possible to use html code in QDoubleSpinBox suffix?

[Matthias Pospiech]

I would like to write a unit to a QDoubleSpinBox, such as square 
millimeter. In a label I can do
"mm<sup>2</sup>", but the same does not work as a suffix in a spinbox.

Is there any possible workaround to get such output?

Matthias