AbstractMobileAppWizard: Allow subclasses to control the flow of pages

The Symbian components wizard would like to hide e.g. the Orientation
page. Re-implementing nextId() will allow to do so.

Change-Id: Id748d88bbc28b93aba4ffe8fccebf540d0946686x
Reviewed-on: http://codereview.qt.nokia.com/395
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/qt4projectmanager/wizards/abstractmobileappwizard.h

@@ -65,10 +65,9 @@ protected:
     virtual void initializePage(int id);
     virtual void cleanupPage(int id);
 
-private:
-
     virtual int nextId() const;
 
+private:
     int idOfNextGenericPage() const;
     Utils::WizardProgressItem *itemOfNextGenericPage() const;