added wxTextEntry::SetHint() (a.k.a. cue banner or placeholder string)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59263 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/combobox.h

@@ -149,6 +149,10 @@ public:
     virtual void GetSelection(long *from, long *to) const;
     virtual bool IsEditable() const;
     virtual void SetEditable(bool editable);
+
+private:
+    // implement wxTextEntry pure virtual method
+    virtual wxWindow *GetEditableWindow() { return this; }
 };
 
 #endif // __WX_COCOA_COMBOBOX_H__