Gui: Attach PythonConsole to parameter group and handle changes in its OnChange() method

This avoids code duplications and makes sure the group name is used only once.
The parameters are saved to the group 'PythonConsole' instead of 'General'.

src/Gui/MainWindow.cpp

@@ -425,15 +425,6 @@ MainWindow::MainWindow(QWidget * parent, Qt::WindowFlags f)
     // Python console
     if (hiddenDockWindows.find("Std_PythonView") == std::string::npos) {
         PythonConsole* pcPython = new PythonConsole(this);
-        ParameterGrp::handle hGrp = App::GetApplication().GetUserParameter().
-            GetGroup("BaseApp")->GetGroup("Preferences")->GetGroup("General");
-
-        if (hGrp->GetBool("PythonWordWrap", true)) {
-          pcPython->setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
-        } else {
-          pcPython->setWordWrapMode(QTextOption::NoWrap);
-        }
-
         pcPython->setWindowIcon(Gui::BitmapFactory().iconFromTheme("applications-python"));
         pcPython->setObjectName
             (QString::fromLatin1(QT_TRANSLATE_NOOP("QDockWidget","Python console")));