Springify CP manager, highlight the default quota in the quota view and
editor, better guess the default quota in editor if none available base
on type of resource

Transfer metadata by copy / upload / download of zip files, unify copy
of streams, copy metadata during copy of courses, remove backwards
compatibility mode for import

Only load versions once in folder list, unit tests from VFS rename and
copy...

Move the functions of OlatRootFile and OlatRootFolder to the Local
implementations to simplify the use of VFS, implements factory methods
in VFSManager, reduce the number of call to meta informations in folder
listing

Fix deletion of metadata, fix left files by restore of versioned files,
implement restore of metadata of deleted versioned files, implements an
upgrader to delete metadata of deleted resources, courses, groups,
forums, users and temporary uploaded files

Configuration is ok, if a user is able to log in edu-sharing.

- Select resources from edu-sharing
- Use edu-sharing rendering service to display the resources
- Synchronize usage between OpenOLAT and edu-sharing
- Exchange configuration (metadata) between OpenOLAt and edu-sharing