1. added possibility to test setting tooltip for the widget

2. added WidgetPage::GetWidget2() for pages like the spin one which shows
   2 widgets and not only one


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32440 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/spinbtn.cpp

@@ -77,6 +77,7 @@ public:
     virtual ~SpinBtnWidgetsPage(){};
 
     virtual wxControl *GetWidget() const { return m_spinbtn; }
+    virtual wxControl *GetWidget2() const { return m_spinctrl; }
 
 protected:
     // event handlers