Bug 120727 Info text area does not appear in PopupDialog
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/PopupDialog.java
if (hasInfoArea()) {
			infoSeparator = createHorizontalSeparator(composite);
			createInfoTextArea(composite);
		}
		applyColors(composite);
		applyFonts(composite);
		return composite;
	}
	/**
	 * Creates and returns the contents of the dialog (the area below the title
	 * area and above the info text area.
	 * <p>
	 * The <code>PopupDialog</code> implementation of this framework method
	 * creates and returns a new <code>Composite</code> with standard margins
	 * and spacing.
	 * <p>
	 * The returned control's layout data must be an instance of
	 * <code>GridData</code>. This method must not modify the parent's
	 * layout.
	 * <p>
	 * Subclasses must override this method but may call <code>super</code> as
	 * in the following example:
	 * 
	 * <pre>
	 * Composite composite = (Composite) super.createDialogArea(parent);
	 * //add controls to composite as necessary
	 * return composite;
	 * </pre>
	 * 
	 * @param parent