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
}
	/**
	 * Compute all of the markers for the receiver's type.
	 * 
	 * @param subMonitor
	 * @return MarkerEntry
	 */
	private Collection computeAllMarkers(SubProgressMonitor subMonitor) {
		Collection allMarkers = new HashSet();
		findMarkers(allMarkers, new IResource[] { ResourcesPlugin
				.getWorkspace().getRoot() }, null, IResource.DEPTH_INFINITE,
				subMonitor);
		return allMarkers;
	}
	/**
	 * Compute the marker for the supplied filter and add to return markers.
	 * 
	 * @param returnMarkers {@link Collection} of {@link IMarker}
	 * @param subMonitor
	 * @param filterGroup
	 */
	private void computeMarkers(Collection returnMarkers,
			SubProgressMonitor subMonitor, MarkerFieldFilterGroup filterGroup) {
		int filterType = filterGroup.getScope();
		switch (filterType) {
		case MarkerFieldFilterGroup.ON_ANY: {
			findMarkers(returnMarkers, new IResource[] { ResourcesPlugin
					.getWorkspace().getRoot() }, filterGroup,
					IResource.DEPTH_INFINITE, subMonitor);
			break;