Move wxAdv library contents into wxCore

This basically removes the "adv" library, even though it's still
preserved for compatibility with user make/project files referring to
it.

It is done because the distinction between "adv" and "core" was never
really clear (e.g. why wxTreeCtrl was in core but wxTreeListCtrl in
adv?) and it prevented some core classes from using adv ones.

include/wx/editlbox.h

@@ -26,12 +26,12 @@ class WXDLLIMPEXP_FWD_CORE wxListEvent;
 #define wxEL_NO_REORDER         0x0800
 #define wxEL_DEFAULT_STYLE      (wxEL_ALLOW_NEW | wxEL_ALLOW_EDIT | wxEL_ALLOW_DELETE)
 
-extern WXDLLIMPEXP_DATA_ADV(const char) wxEditableListBoxNameStr[];
+extern WXDLLIMPEXP_DATA_CORE(const char) wxEditableListBoxNameStr[];
 
 // This class provides a composite control that lets the
 // user easily enter list of strings
 
-class WXDLLIMPEXP_ADV wxEditableListBox : public wxPanel
+class WXDLLIMPEXP_CORE wxEditableListBox : public wxPanel
 {
 public:
     wxEditableListBox() { Init(); }