Bug 214137 [Markers] Unbound system filters should be bound to problems view.
In 3.3 we supported systemFilters which are not currently picked up by the problems view. We should pick these up for compatiblity.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/PriorityMarkerFieldFilter.java
final static int PRIORITY_HIGH = 1 << IMarker.PRIORITY_HIGH;
	final static int PRIORITY_NORMAL = 1 << IMarker.PRIORITY_NORMAL;
	final static int PRIORITY_LOW = 1 << IMarker.PRIORITY_LOW;
	private static final String TAG_SELECTED_PRIORITIES = "selectedPriorities"; 
	int selectedPriorities = PRIORITY_HIGH + PRIORITY_LOW + PRIORITY_NORMAL;
	/**
	 * Create a new instance of the receiver
	 */
	public PriorityMarkerFieldFilter() {
		super();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerFieldFilter#loadSettings(org.eclipse.ui.IMemento)
	 */
	public void loadSettings(IMemento memento) {
		Integer priority = memento.getInteger(TAG_SELECTED_PRIORITIES);