Merge pull request #176 from Raykazi/prefence-window-event-fix

Change to fix PreferencesWindow_Closed from not executing

SMT/MainWindow.xaml.cs

@@ -905,13 +905,13 @@ private void Preferences_MenuItem_Click(object sender, RoutedEventArgs e)
             }
 
             preferencesWindow = new PreferencesWindow();
+            preferencesWindow.Closed += PreferencesWindow_Closed;
             preferencesWindow.Owner = this;
             preferencesWindow.DataContext = MapConf;
             preferencesWindow.MapConf = MapConf;
             preferencesWindow.EM = EVEManager;
             preferencesWindow.Init();
             preferencesWindow.ShowDialog();
-            preferencesWindow.Closed += PreferencesWindow_Closed;
         }
 
         private void PreferencesWindow_Closed(object sender, EventArgs e)