Bugfix: Spaces on "Shared via link"-page

Spaces on the "Shared via link"-page are now being displayed correctly. Also, the sidebar for those has been fixed.

https://github.com/owncloud/web/pull/7651
https://github.com/owncloud/web/pull/7742
https://github.com/owncloud/web/pull/7870
https://github.com/owncloud/web/issues/7103
https://github.com/owncloud/web/issues/7741
https://github.com/owncloud/web/issues/7869
