refresh the tree ctrl when its back/foreground colour changes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11466 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/treectlg.h

@@ -222,7 +222,6 @@ public:
 
         // Only for internal use right now, but should probably be public
     wxTreeItemId GetNext(const wxTreeItemId& item) const;
-    wxTreeItemId GetPrev(const wxTreeItemId& item) const;
 
     // operations
     // ----------
@@ -329,6 +328,10 @@ public:
 
     // implementation only from now on
 
+    // overridden base class virtuals
+    virtual bool SetBackgroundColour(const wxColour& colour);
+    virtual bool SetForegroundColour(const wxColour& colour);
+
     // callbacks
     void OnPaint( wxPaintEvent &event );
     void OnSetFocus( wxFocusEvent &event );