Bug 109702 [IDE] [Progress] startup workspace refresh blocks ui
the refresh action at startup of eclipse blocks the ui and cannot be moved into background. this is a similar problem as mentioned in bugzilla 82406 for the package explorer. only the refresh out of the navigator view has the possibility to switch to background.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
/**
     * Array of <code>AboutInfo</code> for all new installed
     * features that specify a welcome perspective.
     */
    private AboutInfo[] welcomePerspectiveInfos = null;
    /**
     * Helper for managing activites in response to workspace changes.
     */
    private IDEWorkbenchActivityHelper activityHelper = null;
    
    /**
     * Helper for managing work that is performed when the system is
     * otherwise idle.
     */
    private IDEIdleHelper idleHelper;
	/**
     * Creates a new workbench advisor instance.
     */
    public IDEWorkbenchAdvisor() {
        super();
        if (workbenchAdvisor != null) {
            throw new IllegalStateException();
        }
        workbenchAdvisor = this;
    }
    /* (non-Javadoc)
     * @see org.eclipse.ui.application.WorkbenchAdvisor#initialize
     */
    public void initialize(IWorkbenchConfigurer configurer) {