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/ModulePrefs.cpp

@@ -161,5 +161,9 @@ void ModulePrefs::SetModuleStatus( wxString fname, int iStatus ){
    gPrefs->Flush();
 }
 
+PrefsPanel *ModulePrefsFactory::Create(wxWindow *parent)
+{
+   return new ModulePrefs(parent);
+}