Bug 246105 [Dialogs] Title and description not layed out properly when title image is null
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/TitleAreaDialog.java
* and returns a new <code>Composite</code> with no margins and spacing.
	 * Subclasses should override.
	 * </p>
	 * 
	 * @param parent
	 *            The parent composite to contain the dialog area
	 * @return the dialog area control
	 */
	protected Control createDialogArea(Composite parent) {
		
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.verticalSpacing = 0;
		layout.horizontalSpacing = 0;
		composite.setLayout(layout);
		composite.setLayoutData(new GridData(GridData.FILL_BOTH));
		composite.setFont(parent.getFont());
		
		Label titleBarSeparator = new Label(composite, SWT.HORIZONTAL
				| SWT.SEPARATOR);
		titleBarSeparator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		return composite;
	}
	/**
	 * Creates the dialog's title area.
	 * 
	 * @param parent
	 *            the SWT parent for the title area widgets