Bug 245437 [Preferences] (HEAD) Preference pages not scrollable (accessible) via keyboard
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
}
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.core.runtime.ISafeRunnable#handleException(java.lang.Throwable)
			 */
			public void handleException(Throwable e) {
				errorOccurred = true;
				
				Policy.getLog().log(new Status(IStatus.ERROR, Policy.JFACE, 0, e.toString(), e));
				clearSelectedNode();
				String message = JFaceResources.getString("SafeRunnable.errorMessage"); 
                Policy.getStatusHandler().show(
                        new Status(IStatus.ERROR, Policy.JFACE, message, e),
                        JFaceResources.getString("Error"));                                                              
			}
		});
	}
	/**
	 * Selects the page determined by <code>lastSuccessfulNode</code> in the
	 * page hierarchy.
	 */
	void selectCurrentPageAgain() {
		if (lastSuccessfulNode == null) {
			return;
		}
		getTreeViewer().setSelection(new StructuredSelection(lastSuccessfulNode));
		currentPage.setVisible(true);
	}