fixed marker service to resemble persistency changes

refs 416

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/MarkerService.java

@@ -57,7 +57,7 @@ import org.fortiss.tooling.kernel.ui.service.IMarkerService;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating GREEN Hash: 702B4DF7A511DDED96D544A643B1F0BE
+ * @ConQAT.Rating GREEN Hash: 97406556E23ADA709853030640FB078F
  */
 public class MarkerService implements IMarkerService,
 		IPersistencyServiceListener, ILightweightLabelDecorator {
@@ -274,6 +274,7 @@ public class MarkerService implements IMarkerService,
 	private void clearViolationCache(ITopLevelElement element) {
 		synchronized (violationCache) {
 			violationCache.remove(element);
+			updateUI.schedule();
 		}
 	}