Bug 5677 Hierarchy outline has empty space
I opened a hierarchy view on IActionDelegate. Selected a few of the subinterfaces, changed the expansion state of the tree. Then, no matter which item I selected in the top window (the hierarchy tree), the bottom window (the outline table) always had exactly four empty rows before the first item was listed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/dialogfields/ListDialogField.java
protected TableViewer fTable;
	protected ILabelProvider fLabelProvider;
	protected ListViewerAdapter fListViewerAdapter;
	protected List fElements;
	protected ViewerSorter fViewerSorter;
	protected String[] fButtonLabels;
	private Button[] fButtonControls;
	
	private boolean[] fButtonsEnabled;
	
	private int fRemoveButtonIndex;
	private int fUpButtonIndex;
	private int fDownButtonIndex;
	
	private Label fLastSeparator;
	
	private Table fTableControl;
	private Composite fButtonsControl;
	private ISelection fSelectionWhenEnabled;
	
	private TableColumn fTableColumn;
	
	private IListAdapter fListAdapter;