Bug 114962 [Decorators] Remove DecoratorUpdateListener class from IDE plug-in
DecoratorUpdateListener class should be removed as it is just experimental in 3.2 (see org.eclipse.ui.ide plugin)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
* @see org.eclipse.ui.application.WorkbenchAdvisor
     */
    public String getInitialWindowPerspectiveId() {
        int index = PlatformUI.getWorkbench().getWorkbenchWindowCount() - 1;
        String perspectiveId = null;
        AboutInfo[] welcomeInfos = getWelcomePerspectiveInfos();
        if (index >= 0 && welcomeInfos != null
                && index < welcomeInfos.length) {
            perspectiveId = welcomeInfos[index].getWelcomePerspectiveId();
        }
        if (perspectiveId == null) {
            perspectiveId = IDE.RESOURCE_PERSPECTIVE_ID;
        }
        return perspectiveId;
    }
    /**
     * Returns the map of versioned feature ids -> info object for all installed
     * features. The format of the versioned feature id (the key of the map) is
     * featureId + ":" + versionId.
     * 
     * @return map of versioned feature ids -> info object (key type:
     *         <code>String</code>, value type: <code>AboutInfo</code>)
     * @since 3.0
     */
    private Map computeBundleGroupMap() {
        
        Map ids = new TreeMap();
        IBundleGroupProvider[] providers = Platform.getBundleGroupProviders();
        for (int i = 0; i < providers.length; ++i) {
            IBundleGroup[] groups = providers[i].getBundleGroups();