1. wxBitmap copy ctor and operator=() taking wxIcon added

2. wxBitmapButton focus rect looks a bit better and it respects the icon
   mask
3. wxWizard::GetPageSize() added


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4550 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/wizard.cpp

@@ -265,6 +265,11 @@ wxWizardPage *wxWizard::GetCurrentPage() const
     return m_page;
 }
 
+wxSize wxWizard::GetPageSize() const
+{
+    return wxSize(m_width, m_height);
+}
+
 void wxWizard::OnCancel(wxCommandEvent& WXUNUSED(event))
 {
     // this function probably can never be called when we don't have an active