EDIT

ref #9884 refactoring UI enablement:

• ui beans never are null
• disabled beans have state.enabled=false
• uis throw UIDisabledException
• ErrorView to show UIDisabledException
• UIDisabledErrorHandle delegates to the ErrorView

ref #7833 fixing null-view bug

fix #7846 editor context information shown as breadcrumbs in the toolbar of popup editors

fix #7036 making sure all spring beans are disposed when the vaadin session times out

• RegistrationToolbar, RegistrationUI, RegistrationWorkingsetPresenter, NavigationManagerBean as DisposableBean
• seetting the vaadin closeIdleSessions parameter to true in web.xml

fix #7824 cleaning up maps in PopupViewRegistration when views are detached - closes memory leak

fix #7742 unsubscribing other beans from event bus on dispose()

fix #7742 disposing view, presenter and ehcaches when popupviews are closed

fix #7358 stopping navigation and showing dialog when modal dialogs are open

ref #7550 replacing the selfregisration of the VaadinUserHelper to the vaadin session by a UserHelperAccess bean

ref #7550 moving the actual CdmUserHelper to cdmlib and making it available in cdm-vaadin by extending the UserHelper class and interface hierarchy