Added chainable wxWizardPageSimple::Chain() overload.

Add the simplest and most fool proof of chaining the pages in static wizards:
just chain several calls to the new, non-static, wxWizardPageSimple::Chain()
overload.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73806 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/wizard.h

@@ -147,7 +147,15 @@ public:
     void SetPrev(wxWizardPage *prev) { m_prev = prev; }
     void SetNext(wxWizardPage *next) { m_next = next; }
 
-    // a convenience function to make the pages follow each other
+    // Convenience functions to make the pages follow each other without having
+    // to call their SetPrev() or SetNext() explicitly.
+    wxWizardPageSimple& Chain(wxWizardPageSimple* next)
+    {
+        SetNext(next);
+        next->SetPrev(this);
+        return *next;
+    }
+
     static void Chain(wxWizardPageSimple *first, wxWizardPageSimple *second)
     {
         wxCHECK_RET( first && second,