QScientificSpinBox for scientific notation in QDoubleSpinBox ?

Hi.

It would be great to have a QScientificSpinBox widget for a scientific notation in a spin box with a singleStep/setSingleStep with a factor instead of an increment (default factor of 10. that allow to play with the exponent part instead of the fractional part). I suggest that because the current QDoubleSpinBox is not adapted to work with low/large double or with very big intervals of values (which is oftenly the case with doubles...).

Thank you.