Add wxTextEntryBase::ForwardEnableTextChangedEvents().

Use this method to forward the status of text events in the implementation of
wxComboBox in wxOSX/Carbon. This ensures that the events are correctly [not]
generated when various wxComboBox methods are called.

The unit tests now also pass with wxOSX/Carbon.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63882 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/combobox.h

@@ -132,7 +132,9 @@ class WXDLLIMPEXP_CORE wxComboBox : public wxControl, public wxComboBoxBase
     virtual bool CanRedo() const;
 
     virtual wxClientDataType GetClientDataType() const;
-#endif
+
+    virtual wxTextWidgetImpl* GetTextPeer() const;
+#endif // wxOSX_USE_CARBON