Bug 127289 [Markers] SystemFilter and group selection state not preserved
We are not preserving the selection state of the system filters or which group is selected.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerFilter.java
resultList.add(marker);
					}
				}
			}
		}
		mon.done();
		return resultList;
	}
	/**
	 * Subclasses should override to determine if the given marker passes the
	 * filter.
	 * 
	 * @param marker
	 * @return <code>true</code> if the marker passes the filter and
	 *         <code>false</code> otherwise
	 */
	protected boolean selectMarker(ConcreteMarker marker) {
		return true;
	}
	/**
	 * Searches the workspace for markers that pass this filter.
	 * 
	 * @return Collection of markers.
	 */
	Collection findMarkers(IProgressMonitor mon, boolean ignoreExceptions)
			throws CoreException {
		List unfiltered = Collections.EMPTY_LIST;
		if (!isEnabled()) {
			unfiltered = findMarkers(new IResource[] { ResourcesPlugin
					.getWorkspace().getRoot() }, IResource.DEPTH_INFINITE, -1,