Enhancement: Duplicate space

We've added a new functionality, where users can simply duplicate spaces, via the context menu or batch actions.
This includes copying the contents, the space name, subtitle, description, and image but not metadata
like tags or members.

https://github.com/owncloud/web/pull/10024
https://github.com/owncloud/web/pull/10132
https://github.com/owncloud/web/pull/10139
https://github.com/owncloud/web/issues/10016
https://github.com/owncloud/web/issues/10123
