Bug 229084 [About] up/down buttons don't enable for About->Plug-in Details->Columns
The Columns dialog in About->Plug-in Details->Columns has an up and a down button. They don't enable when a list item is selected.
bundles/org.eclipse.jface/src/org/eclipse/jface/internal/ConfigureColumnsDialog.java
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
/**
 * NON-API - This class is internal and will be moved to another package in 3.5.
 * 
 */
public class ConfigureColumnsDialog extends Dialog {
	private Control targetControl;
	private ColumnObject[] columnObjects;
	private Table table;
	private Button upButton;
	private Button downButton;
	private Text text;
	class ColumnObject {
		Item column;
		int index;
		String name;
		boolean visible;
		int width;
		boolean moveable;
		boolean resizable;
		ColumnObject(Item column, int index, String text, int width,
				boolean moveable, boolean resizable, boolean visible) {