Enhancement: File sidebar in viewer and editor apps

Viewer and editor apps now have the same right sidebar available like the `files` app.
This makes in place viewing file details, tagging, sharing, and much more possible.

https://github.com/owncloud/web/pull/10111
https://github.com/owncloud/web/pull/10152
https://github.com/owncloud/web/pull/10344
