move Freeze() and Thaw() to wxWindowBase to ensure that they behave consistently (i.e. recursively, as described in the docs) in all ports; removed different duplications of freeze count from derived classes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51018 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/window.h

@@ -62,9 +62,6 @@ public:
 
     virtual void Refresh( bool eraseBackground = true,
                           const wxRect *rect = NULL );
-    virtual void Freeze();
-    virtual void Thaw();
-    virtual bool IsFrozen() const;
 
     virtual void Update() ;
     virtual void ClearBackground();
@@ -86,6 +83,9 @@ protected:
     virtual void DoEnable( bool enable );
     virtual bool DoPopupMenu( wxMenu *menu, int x, int y );
 
+    virtual void DoFreeze();
+    virtual void DoThaw();
+
 public:
     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
                                int range, bool refresh = true );
@@ -262,9 +262,6 @@ protected:
     // For controls like radio buttons which are genuinely composite
     wxList              m_subControls;
 
-    // number of calls to Freeze() minus number of calls to Thaw()
-    unsigned int        m_frozenness;
-
     // the peer object, allowing for cleaner API support
     wxMacControl *       m_peer ;