Bug 5449 TVT Text Expansion/Truncations in new java class dialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/dialogfields/ListDialogField.java
button.setLayoutData(gd);
		return button;
	}
	
	private Label createSeparator(Composite parent) {
		Label separator= new Label(parent, SWT.NONE);
		separator.setVisible(false);
		MGridData gd= new MGridData();
		gd.horizontalAlignment= gd.FILL;
		gd.verticalAlignment= gd.BEGINNING;
		gd.heightHint= 4;
		separator.setLayoutData(gd);
		return separator;
	}			
	/**
	 * Returns the composite containing the buttons. When called the first time, the control
	 * will be created.
	 * @param The parent composite when called the first time, or <code>null</code>
	 * after.
	 */	
	public Composite getButtonBox(Composite parent) {
		if (fButtonsControl == null) {
			assertCompositeNotNull(parent);
			
			SelectionListener listener= new SelectionListener() {
				public void widgetDefaultSelected(SelectionEvent e) {
					doButtonSelected(e);
				}
				public void widgetSelected(SelectionEvent e) {