FIX:preferences dialog location problem in high scaling ratio

Change-Id: I109c8563ff946d6ed8aca647b17d4c4b1491a65b

src/slic3r/GUI/Preferences.hpp

@@ -60,6 +60,7 @@ private:
 
 protected:
     wxBoxSizer *  m_sizer_body;
+    wxScrolledWindow *m_scrolledWindow;
 
     // bool								m_settings_layout_changed {false};
     bool m_seq_top_layer_only_changed{false};