+import jalview.util.MessageManager;
+import jalview.util.Platform;
+
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.HeadlessException;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.io.File;
+import java.util.StringTokenizer;
+import java.util.Vector;
+
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.JFileChooser;
+import javax.swing.JList;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.SpringLayout;