Bug 283555 [Markers] Configure Contents dialog: Types section should not have columns
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/TypesConfigurationArea.java
private Collection children = new ArrayList();
		private String name;
		/**
		 * Create a new instance of the receiver.
		 * 
		 * @param categoryName
		 */
		public CategoryEntry(String categoryName) {
			name = categoryName;
		}
		/**
		 * Add the node to the receiver.
		 * 
		 * @param node
		 */
		public void add(MarkerTypeEntry node) {
			children.add(node);
			node.setParent(this);
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.ui.internal.provisional.views.markers.TypesConfigurationArea.TypesEntry#addElementsMatching(java.util.Collection,
		 *      java.util.Collection)
		 */
		public void addElementsMatching(Collection selectedTypes,
				Collection entries) {
			Iterator childIterator = children.iterator();
			while (childIterator.hasNext()) {
				((MarkerTypeEntry) childIterator.next()).addElementsMatching(