Call wxTLW::SetDefaultItem() from wxButtonBase::SetDefault() instead of doing

it in wxButton implementations in (almost) all ports; changed its return type
to "wxWindow *" from "void" to accommodate the ports needing the old default
item (replaces part of patch 1696563)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45338 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/bmpbuttn.h

@@ -66,7 +66,6 @@ public:
     //
     // Implementation
     //
-    virtual void SetDefault();
     virtual bool OS2OnDraw(WXDRAWITEMSTRUCT* pItem);
 
 private: