Use wxMenuBar::Attach/Detach() instead of SetInvokingWindow() in wxGTK1.

This is the same as r64127 for wxGTK.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64145 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/menu.h

@@ -37,17 +37,15 @@ public:
     virtual void SetMenuLabel( size_t pos, const wxString& label );
     virtual wxString GetMenuLabel( size_t pos ) const;
 
-    // implementation only from now on
-    void SetInvokingWindow( wxWindow *win );
-    void UnsetInvokingWindow( wxWindow *win );
-
     // common part of Append and Insert
     bool GtkAppend(wxMenu *menu, const wxString& title, int pos=-1);
 
+    virtual void Attach(wxFrame *frame);
+    virtual void Detach();
+
     GtkAccelGroup   *m_accel;
     GtkWidget       *m_menubar;
     long             m_style;
-    wxWindow        *m_invokingWindow;
 
 private:
     void Init(size_t n, wxMenu *menus[], const wxString titles[], long style);