Init

This is fixing a bug in the file chooser UI. The automatic validation happens while creating the initial file system tree model, which happens before the JFileChooser constructor returns. That means the initial validation runs with the default JFileChooser configuration, not the configuration intended by the application. I observed this problem because I called setFileHidingEnabled() with the non-default value. The first showing of the JFileChooser was incorrect because it used the default value instead.