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/MarkerFieldFilterGroup.java
}
	/**
	 * Return the name of the receiver.
	 * 
	 * @return String
	 */
	public String getName() {
		if (name == null) {
			if (element == null)
				name = MarkerSupportConstants.EMPTY_STRING;
			else
				name = element
						.getAttribute(MarkerSupportConstants.ATTRIBUTE_NAME);
		}
		return name;
	}
	/**
	 * Return the resources in the working set. If it is empty then return the
	 * workspace root.
	 * 
	 * @return IResource[]
	 */
	IResource[] getResourcesInWorkingSet() {
		if (workingSet == null) {
			return new IResource[0];
		}
		if (workingSet.isEmpty()) {
			return new IResource[] { ResourcesPlugin.getWorkspace().getRoot() };
		}
		IAdaptable[] elements = workingSet.getElements();