Enhancement: Update ownCloud Web to v5.2.0

Tags: web

We updated ownCloud Web to v5.2.0. Please refer to the changelog (linked) for details on the web release.

https://github.com/owncloud/web/pull/6506
https://github.com/owncloud/ocis/pull/3202
https://github.com/owncloud/web/releases/tag/v5.2.0
