Bug 208055 [Markers] Need a sorting method for the markers view
As there is currently no accessible way to change sort order or direction. A menu should be enough.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
MarkerGroup group = MarkerSupportRegistry
					.getInstance()
					.getMarkerGroup(
							children[i]
									.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID));
			
			if (group == null) {
				StatusManager
						.getManager()
						.handle(
								new Status(
										IStatus.ERROR,
										configurationElement
												.getDeclaringExtension()
												.getNamespaceIdentifier(),
										NLS
												.bind(
														MarkerMessages.ContentGenerator_NoGrouping,
														new Object[] {
																children[i]
																		.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID),
																configurationElement
																		.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID) })),
								StatusManager.LOG);
			} else
				groups.add(group);
		}
	}
}