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/CachedMarkerBuilder.java
/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.operation.IRunnableWithProgress#run(org.eclipse.core.runtime.IProgressMonitor)
				 */
				public void run(IProgressMonitor monitor) {
					
					if (refreshingMarkers())
						return;
					sortAndMakeCategories(monitor, currentMap);
				}
			});
		} catch (InvocationTargetException e) {
			StatusManager.getManager().handle(
					StatusUtil.newStatus(IStatus.ERROR,
							e.getLocalizedMessage(), e));
		} catch (InterruptedException e) {
			StatusManager.getManager().handle(
					StatusUtil.newStatus(IStatus.ERROR,
							e.getLocalizedMessage(), e));
		}
	}
	/**
	 * Check if the markers are still being built. If so schedule an update.
	 * 
	 * @return <code>true</code> if the map is empty.
	 */
	private boolean refreshingMarkers() {
		if (currentMap == null) {
			scheduleMarkerUpdate();