OO-2575: better handle error during login with defective business path, fix NPE in artefact pool v1 if the portfolio v1 is disabled

OO-2402. don't try to launch a resource if there is nothing to launch, hardened the authentication dispatcher to accept manipulated urls and redirect them to the current page

OO-2248: implements a fully configurable Open ID Connect (Implicit flow) provider and make possible to collect several of them on the same OpenOLAT instance

OO-1949: remove entryUrl and replace it with businessPath, don't process business path in dispatcher if the login interceptors are visible...

OO-722,OO-1635: implements more business path in authoring environment and folder component, fix red screen

OO-1635,OO-722: refactor the ajax by iframe to use XHR, push the current business path to the browser via HTML5 push state, implements back button support via HTML5 History API...

OO-1561 replace lang parameter in pwd change and registration email with language parameter to not collide with html entity ⟨

OO-1362: make the guest login, links for guests and invitation login configurable in the administration GUI

OO-1251: return a copy of the list of enabled language to prevent concurrent modification red screens

OO-763: merge the BaseChiefController with the BaseFullWebappController to flatten the div hierarchy and minimze it

OO-798, OO-797, OO-796: update the webdav implementation based on Tomcat, make OpenOLAt work under root context, small refactoring of the dispatchers, push raw files dispatcher to its own servlet, implements Digest authentication...