Bug 317954 Version deltas file so that incompatible changes will be ignored
The deltas file needs to be versioned so that incompatible changes will be discarded allowing the workbench to be constructed as if there were no deltas in existence.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/XMLModelReconciler.java
for (Entry<EObject, EList<FeatureChange>> entry : objectChanges.entrySet()) {
					EObject key = entry.getKey();
					if (key instanceof MPart) {
						for (FeatureChange change : entry.getValue()) {
							if (change.getFeatureName().equals(PART_MENUS_ATTNAME)) {
								List<?> originalMenus = (List<?>) change.getValue();
								if (originalMenus.contains(reference)) {
									return key;
								}
								if (((MPart) key).getMenus().contains(reference)) {
									appendedMenu = true;
								}
								break;
							}
						}
					}
				}
				boolean menuSet = false;
				boolean menuChanged = false;
				for (Entry<EObject, EList<FeatureChange>> entry : objectChanges.entrySet()) {
					EObject key = entry.getKey();
					if (key instanceof MWindow) {
						for (FeatureChange change : entry.getValue()) {
							if (change.getFeatureName().equals(WINDOW_MAINMENU_ATTNAME)) {
								Object oldMenu = change.getValue();
								if (oldMenu == reference) {
									return key;
								} else if (oldMenu == null
										&& ((MWindow) key).getMainMenu() == reference) {
									menuSet = true;