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
true,
				 false,
				 false,
				 ItemPropertyDescriptor.GENERIC_VALUE_IMAGE,
				 null,
				 null));
	}
	/**
	 * This adds a property descriptor for the Icon URI feature.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void addIconURIPropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_UILabel_iconURI_feature"), 
				 getString("_UI_PropertyDescriptor_description", "_UI_UILabel_iconURI_feature", "_UI_UILabel_type"), 
				 UiPackageImpl.Literals.UI_LABEL__ICON_URI,
				 true,
				 false,
				 false,
				 ItemPropertyDescriptor.GENERIC_VALUE_IMAGE,
				 null,
				 null));
	}
	/**
	 * This adds a property descriptor for the Tooltip feature.