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
Item[] columns = getViewerColumns();
		ColumnObject[] cObjects = new ColumnObject[columns.length];
		for (int i = 0; i < columns.length; i++) {
			Item c = columns[i];
			cObjects[i] = new ColumnObject(c, i, getColumnName(c),
					getColumnWidth(c), getMoveable(c), getResizable(c), true);
		}
		int[] columnOrder = getColumnOrder();
		columnObjects = new ColumnObject[columns.length];
		for (int i = 0; i < columnOrder.length; i++) {
			columnObjects[columnOrder[i]] = cObjects[i];
		}
	}
	/**
	 * @return
	 */
	private int[] getColumnOrder() {
		if (targetControl instanceof Table) {
			return ((Table) targetControl).getColumnOrder();
		} else if (targetControl instanceof Tree) {
			return ((Tree) targetControl).getColumnOrder();
		}
		return new int[0];
	}
	/**
	 * @param c
	 * @return
	 */
	private boolean getMoveable(Item item) {
		if (item instanceof TableColumn) {