Bug 309563 All packages (o.e.e4.ui.model.workbench.edit) of ItemProviders need to be exported
Before, there is only one ApplicationItemProviderAdapterFactory used by e4 Visual Designer. Now with the new model in multiple packages, we need to export all the corresponding ItemProvider.
bundles/org.eclipse.e4.ui.model.workbench.edit/src/org/eclipse/e4/ui/model/application/ui/basic/provider/PartItemProvider.java
getString("_UI_Dirtyable_dirty_feature"), 
				 getString("_UI_PropertyDescriptor_description", "_UI_Dirtyable_dirty_feature", "_UI_Dirtyable_type"), 
				 UiPackageImpl.Literals.DIRTYABLE__DIRTY,
				 true,
				 false,
				 false,
				 ItemPropertyDescriptor.BOOLEAN_VALUE_IMAGE,
				 null,
				 null));
	}
	/**
	 * This adds a property descriptor for the Binding Contexts feature.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void addBindingContextsPropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_Bindings_bindingContexts_feature"), 
				 getString("_UI_PropertyDescriptor_description", "_UI_Bindings_bindingContexts_feature", "_UI_Bindings_type"), 
				 CommandsPackageImpl.Literals.BINDINGS__BINDING_CONTEXTS,
				 true,
				 false,
				 false,
				 ItemPropertyDescriptor.GENERIC_VALUE_IMAGE,
				 null,
				 null));