Bug 208101 [Markers] Tasks content has mark completed enabled for non editable tasks
I20071030-0100 Mark completed is enabled for tasks that are not editable
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
}
					getViewer().setSelection(
							new StructuredSelection(newSelection.toArray()),
							true);
					preservedSelection.clear();
				}
				if (getViewer().getTree().getItemCount() > 0)
					getViewer().getTree().setTopItem(
							getViewer().getTree().getItem(0));
				if (!categoriesToExpand.isEmpty()
						&& builder.getGenerator().isShowingHierarchy()) {
					MarkerItem[] items = builder.getElements();
					for (int i = 0; i < items.length; i++) {
						String name = ((MarkerCategory) items[i]).getName();
						if (categoriesToExpand.contains(name))
							getViewer().expandToLevel(items[i], 2);
					}
				}
				return Status.OK_STATUS;
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.ui.progress.WorkbenchJob#shouldRun()
			 */
			public boolean shouldRun() {
				return !builder.isBuilding();
			}
		};
		updateJob.setSystem(true);