- Avoid java.lang.IllegalStateException because EditorActivationListener tries...

- Avoid java.lang.IllegalStateException because EditorActivationListener tries to update the input of LibraryView's TreeViewer widget after it has been closed (disposed)

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/views/LibraryView.java

@@ -58,7 +58,7 @@ import org.fortiss.tooling.kernel.ui.service.IModelElementHandlerService;
  * @author eder
  * @author $Author: hoelzl $
  * @version $Rev: 18709 $
- * @ConQAT.Rating GREEN Hash: F0CC5ADB2855C236015E6A44FD8E8BBB
+ * @ConQAT.Rating YELLOW Hash: 5D43FE856C34B7875FF0565CCD63F311
  */
 public class LibraryView extends ViewPart {
 
@@ -266,5 +266,12 @@ public class LibraryView extends ViewPart {
 			viewer.setInput(IPrototypeService.INSTANCE.getAllTopLevelPrototypesCategories());
 			switchWorkbenchEditor(part);
 		}
+
+		/** {@inheritDoc} */
+		@Override
+		public void partClosed(IWorkbenchPart part) {
+			getSite().getWorkbenchWindow().getPartService()
+					.removePartListener(editorActivationListener);
+		}
 	}
 }