Aero-Style-QWizard: Remove special handling in Qt Designer.

The wizard now behaves nicely when used as a child widget.

Task-number: QTBUG-29904
Change-Id: I2e9705eb4197b3411c9e072d0d5c05a97df8d47f
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/designer/src/lib/shared/widgetfactory.cpp

@@ -594,16 +594,6 @@ void WidgetFactory::initializeCommon(QWidget *widget) const
     // Apply style
     if (m_currentStyle)
         widget->setStyle(m_currentStyle);
-    // Prevent the wizard from emulating the Windows Vista Theme.
-    // This theme (in both Aero and Basic mode) is tricky to
-    // emulate properly in designer due to 1) the manipulation of the non-client area of
-    // the top-level window, and 2) the upper-right location of the Back button.
-    // The wizard falls back to QWizard::ModernStyle whenever the Vista theme
-    // would normally apply.
-    if (QWizard *wizard = qobject_cast<QWizard *>(widget)) {
-        wizard->setProperty("_q_wizard_vista_off", QVariant(true));
-        return;
-    }
 }
 
 // Necessary initializations for preview objects