Table-driven construction of Prefs dialog. A factory for each kind of panel...

... and maybe a future plug-in protocol to break compilation dependency on
all of the PrefsPanel subclasses.

src/prefs/MousePrefs.h

@@ -38,4 +38,9 @@ class MousePrefs :public PrefsPanel
    wxListCtrl * mList;
 };
 
+class MousePrefsFactory : public PrefsPanelFactory
+{
+public:
+   virtual PrefsPanel *Create(wxWindow *parent);
+};
 #endif