* Create a compatibility module QtSvgWidgets.py to handle PySide2 & PySide6
* In the Arch and Material modules use the QtSvgWidgets module
* Since Qt6 the method QFont.setWeight() doesn't accept an int any more but requires an enum. Since the call of QFont.setBold(True) sets
a weight of 75 the extra calls of QFont.setWeight(75) can be safely removed
Co-authored-by: Adrián Insaurralde Avalos <36372335+adrianinsaval@users.noreply.github.com>