Replace wxControlContainer-related macros with wxNavigationEnabled<>.

Simply inherit classes which need to provide TAB navigation among their
children from wxNavigationEnabled<> and remove the now unnecessary
WX_DECLARE_CONTROL_CONTAINER() macros.

Also remove WX_INIT_CONTROL_CONTAINER(), WX_DELEGATE_TO_CONTROL_CONTAINER()
and WX_EVENT_TABLE_CONTROL_CONTAINER() which are not needed neither any more.

And remove the event tables which became empty after removing the last macro.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68366 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/splitter.h

@@ -49,7 +49,7 @@ enum
 //    to prevent flickering. (WS_CLIPCHILDREN doesn't work in all cases so can't be
 //    standard).
 
-class WXDLLIMPEXP_CORE wxSplitterWindow: public wxWindow
+class WXDLLIMPEXP_CORE wxSplitterWindow: public wxNavigationEnabled<wxWindow>
 {
 public:
 
@@ -300,8 +300,6 @@ protected:
     bool        m_checkRequestedSashPosition:1;
 
 private:
-    WX_DECLARE_CONTROL_CONTAINER();
-
     DECLARE_DYNAMIC_CLASS(wxSplitterWindow)
     DECLARE_EVENT_TABLE()
     wxDECLARE_NO_COPY_CLASS(wxSplitterWindow);