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
}
	
	/**
	 * Sets the viewerSorter.
	 * @param viewerSorter The viewerSorter to set
	 */
	public void setViewerSorter(ViewerSorter viewerSorter) {
		fViewerSorter= viewerSorter;
	}	
	
	
	
	private void buttonPressed(int index) {
		if (!managedButtonPressed(index)) {
			fListAdapter.customButtonPressed(this, index);
		}
	}
	
	/**
	 * Checks if the button pressed is handled internally
	 * @return Returns true if button has been handled.
	 */
	protected boolean managedButtonPressed(int index) {
		if (index == fRemoveButtonIndex) {
			remove();
		} else if (index == fUpButtonIndex) {
			up();
		} else if (index == fDownButtonIndex) {
			down();
		} else {