Bug 53386 [ActivityMgmt] Remove show All from everywhere except new wizards
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
*/
	private PreferenceManager preferenceManager;
	/**
	 * Preference store, initially <code>null</code> meaning none.
	 *
	 * @see #setPreferenceStore
	 */
	private IPreferenceStore preferenceStore;
	private Composite titleArea;
	private Color titleAreaColor;
	private Label titleImage;
	/**
	 * The tree viewer.
	 */
	private TreeViewer treeViewer;
	/**
	 * Creates a new preference dialog under the control of the given preference 
	 * manager.
	 *
	 * @param shell the parent shell
	 * @param manager the preference manager
	 */
	public PreferenceDialog(Shell parentShell, PreferenceManager manager) {
		super(parentShell);
		setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX);
		preferenceManager = manager;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
	 */