Bug 203838 [Markers] [Markers] clicking on column headers does not sort table
I20070918 Clicking on any of the column headers does not sort based on the relevant column.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
.getChildren(ELEMENT_MARKER_FIELD_FILTER_GROUP);
			for (int i = 0; i < filterReferences.length; i++) {
				filters.add(new MarkerFieldFilterGroup(filterReferences[i],
						this));
			}
			
			loadFiltersPreference();
		}
		return filters;
	}
	/**
	 * Return the group used to generate categories.
	 * 
	 * @return MarkerGroup or <code>null</code>.
	 */
	public MarkerGroup getCategoryGroup() {
		return categoryGroup;
	}
	/**
	 * Return a new instance of the receiver with the field
	 * 
	 * @return MarkerComparator
	 */
	public MarkerComparator getComparator() {
		MarkerField field = null;
		if (getCategoryGroup() != null)
			field = getCategoryGroup().getMarkerField();
		return new MarkerComparator(field, getAllFields());
	}
	/**