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

interface/wx/event.h

@@ -3497,8 +3497,8 @@ public:
 
     This event is mainly used by wxWidgets implementations.
     A wxNavigationKeyEvent handler is automatically provided by wxWidgets
-    when you make a class into a control container with the macro
-    WX_DECLARE_CONTROL_CONTAINER.
+    when you enable keyboard navigation inside a window by inheriting it from
+    wxNavigationEnabled<>.
 
     @beginEventTable{wxNavigationKeyEvent}
     @event{EVT_NAVIGATION_KEY(func)}