Bug 49005 Preference page doesn't get enough space to draw itself
200312162000 There are cases where the preference dialog doesn't allocate enough space for a page to draw itself. The width of the page seems to be a few pixels short.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
*/
	private boolean isHelpAvailable = false;
	private Point lastShellSize;
	private IPreferenceNode lastSuccessfulNode;
	private String message = ""; 
	private Image messageImage;
	private CLabel messageLabel;
	/**
	 * The minimum page size; 400 by 400 by default.
	 *
	 * @see #setMinimumPageSize
	 */
	private Point minimumPageSize = new Point(400, 400);
	private Color normalMsgAreaBackground;
	/**
	 * The OK button.
	 */
	private Button okButton;
	/**
	 * The Composite in which a page is shown.
	 */
	private Composite pageContainer;
	/**
	 * The preference manager.
	 */
	private PreferenceManager preferenceManager;
	/**
	 * Preference store, initially <code>null</code> meaning none.
	 *
	 * @see #setPreferenceStore