Bug 219483 [Markers] MarkerField needs to support font and colours
Some users want to be able to set the font and colour of an entry in the markers view. We should pass in a ViewerCell for this.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerSeverityAndDescriptionField.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.IMarkerField#compare(org.eclipse.ui.provisional.views.markers.MarkerItem,
	 *      org.eclipse.ui.provisional.views.markers.MarkerItem)
	 */
	public int compare(MarkerItem item1, MarkerItem item2) {
		int severity1 = getSeverity(item1);
		int severity2 = getSeverity(item2);
		if (severity1 == severity2)
			return super.compare(item1, item2);
		return severity2 - severity1;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.IMarkerField#getImage(org.eclipse.ui.provisional.views.markers.MarkerItem)
	 */
	public Image getImage(MarkerItem item) {
		int severity = -1;
		if (item.isConcrete())
			severity = getSeverity(item);
		else if (item instanceof MarkerCategory)
			severity = ((MarkerCategory) item).getHighestSeverity();
		if (severity >= IMarker.SEVERITY_WARNING)
			return MarkerSupportInternalUtilities.getSeverityImage(severity);
		return null;
	}
}