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/api/MarkerField.java
/**
	 * Constant to indicate an ascending sort direction.
	 */
	public static final int ASCENDING = 1;
	private static final String ATTRIBUTE_FILTER_CLASS = "filterClass"; 
	private static final String ATTRIBUTE_FILTER_CONFIGURATION_CLASS = "filterConfigurationClass"; 
	/**
	 * Constant to indicate an descending sort direction.
	 */
	public static final int DESCENDING = -1;
	IConfigurationElement configurationElement;
	/**
	 * Compare item1 and item2 for sorting purposes.