Bug 47150 [Progress] ProgressMonitorJobsDialog used on shutdown
build I20031119-2030 On shutdown, a ProgressMonitorJobsDialog is used when saving the workspace. This is opened with fork=false and cancelable=false. fork=false means the UI is not processing events, so the Jobs button is unresponsive.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
* Returns the set of versioned feature ids from current session.
	 * 
	 * @return set of versioned feature ids (element type: <code>String</code>)
	 */
	private Set getCurrentFeatures() {
		Assert.isNotNull(currentFeatures);
		return currentFeatures;
	}
	
	/**
	 * Returns the ordered set of versioned feature ids new for this session.
	 * 
	 * @return ordered set of versioned feature ids (element type: <code>String</code>)
	 */
	private Set getNewlyAddedFeatures() {
		Assert.isNotNull(newlyAddedFeatures);
		return newlyAddedFeatures;
	}
	
	/**
	 * Initializes the old, current, and newly added features.
	 */
	private void initializeFeatureSets() {
		Assert.isTrue(currentFeatures == null);
		
			
		IDialogSettings settings = IDEWorkbenchPlugin.getDefault().getDialogSettings();
		String[] previousFeaturesArray = settings.getArray(INSTALLED_FEATURES);
		previousFeatures = null;
		if (previousFeaturesArray != null) {