Bug 339347 [Markers] Can't toggle item limits in Problems view any more without losing limit
I20110308-2000 I can't toggle item limits in Problems view any more without losing limits. After I've disabled the limits, the next time I enable limits, the value is "1". The stored value should not be changed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
*/
	UIUpdateJob scheduleUpdate(long delay) {
		synchronized (builder.getUpdateScheduler().getSchedulingLock()) {
			if (uiUpdateJob != null) {
				
				
			} else {
				uiUpdateJob = new UIUpdateJob(this);
				
				uiUpdateJob.setSystem(true);
			}
			IWorkbenchSiteProgressService progressService = builder
					.getProgressService();
			if (progressService != null) {
				progressService.schedule(uiUpdateJob, delay);
			} else {
				uiUpdateJob.schedule(delay);
			}
			return uiUpdateJob;
		}
	}
	/**
	 * @return lastUiRefreshTime
	 * 
	 */
	long getLastUIRefreshTime() {
		if (uiUpdateJob != null) {
			return uiUpdateJob.getLastUpdateTime();
		}
		return -1;