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/MarkerView.java
}
		}
		/**
		 * Add all of the contents of changed.
		 * 
		 * @param addedMarkers
		 *            Collection of ConcreteMarker
		 */
		public void add(Collection addedMarkers) {
			synchronized (updateKey) {
				adds.addAll(addedMarkers);
				refreshes.removeAll(addedMarkers);
			}
		}
		/**
		 * Remove all of the contents of changed.
		 * 
		 * @param removedMarkers
		 *            Collection of ConcreteMarker
		 */
		public void remove(Collection removedMarkers) {
			synchronized (updateKey) {
				removes.addAll(removedMarkers);
				refreshes.removeAll(removedMarkers);
				adds.removeAll(removedMarkers);
			}
		}
	}
	MarkerProcessJob markerProcessJob = new MarkerProcessJob();
	private class UpdateJob extends WorkbenchJob {