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/gtk/combobox.h

@@ -142,7 +142,7 @@ protected:
 
 private:
     // From wxTextEntry:
-    virtual const wxWindow *GetEditableWindow() const { return this; }
+    virtual wxWindow *GetEditableWindow() { return this; }
     virtual GtkEditable *GetEditable() const;
     virtual void EnableTextChangedEvents(bool enable)
     {

include/wx/gtk/textctrl.h

@@ -177,7 +177,6 @@ protected:
 
 private:
     // overridden wxTextEntry virtual methods
-    virtual const wxWindow *GetEditableWindow() const { return this; }
     virtual GtkEditable *GetEditable() const;
     virtual void EnableTextChangedEvents(bool enable);
 

include/wx/gtk/textentry.h

@@ -54,10 +54,6 @@ public:
     void SendMaxLenEvent();
 
 private:
-    // implement this to return the associated window, it will be used for
-    // event generation
-    virtual const wxWindow *GetEditableWindow() const = 0;
-
     // implement this to return the associated GtkEntry or another widget
     // implementing GtkEditable
     virtual GtkEditable *GetEditable() const = 0;