Fixups with Qt6 enums (#13611)

* Python PySide enums to C++ converter

* Python IntFlags to C++ int in getStandardButtons

* Remove int conversion in mods Python sources

src/Gui/PythonWrapper.cpp

@@ -583,6 +583,36 @@ QObject* PythonWrapper::toQObject(const Py::Object& pyobject)
     return qt_getCppType<QObject>(pyobject.ptr());
 }
 
+qsizetype PythonWrapper::toEnum(PyObject* pyPtr)
+{
+#if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
+    return Shiboken::Enum::getValue(pyPtr);
+#else
+    return toEnum(Py::Object(pyPtr);
+#endif
+}
+
+qsizetype PythonWrapper::toEnum(const Py::Object& pyobject)
+{
+#if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
+    return toEnum(pyobject.ptr());
+#else
+    try {
+        Py::Int ret;
+        if (pyobject.hasAttr(std::string("value"))) {
+            ret = Py::Int(pyobject.getAttr(std::string("value")));
+        } else {
+            ret = Py::Int(pyobject);
+        }
+        return (qsizetype)ret;
+    }
+    catch (Py::Exception&) {
+        Base::PyException e; // extract the Python error text
+        e.ReportException();
+    }
+#endif
+}
+
 QGraphicsItem* PythonWrapper::toQGraphicsItem(PyObject* pyPtr)
 {
     return qt_getCppType<QGraphicsItem>(pyPtr);