-import java.util.*;
-
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.*;
-
-import jalview.commands.*;
-import jalview.datamodel.*;
-import jalview.jbgui.*;
-import jalview.util.*;
+import jalview.analysis.AlignSeq;
+import jalview.commands.CommandI;
+import jalview.commands.EditCommand;
+import jalview.commands.EditCommand.Action;
+import jalview.datamodel.SequenceGroup;
+import jalview.datamodel.SequenceI;
+import jalview.jbgui.GSliderPanel;
+import jalview.util.MessageManager;
+
+import java.awt.event.ActionEvent;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Stack;
+import java.util.Vector;
+
+import javax.swing.JInternalFrame;
+import javax.swing.JProgressBar;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.InternalFrameAdapter;
+import javax.swing.event.InternalFrameEvent;