Various changes for simplification of focus event

code in wxGTK. It will also work for wxComboBox
    now, but not for GTK's other composite controls
    such as wxListBox and wxChoice.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11414 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/controls/controls.cpp

@@ -787,6 +787,7 @@ MyPanel::MyPanel( wxFrame *frame, int x, int y, int w, int h )
                                   bmp1,
                                   wxPoint(30, 70)
                                  );
+
     bmpBtn->SetBitmapSelected(bmp2);
     bmpBtn->SetBitmapFocus(bmp3);