owncloud/core

Bugfix: Avoid retrieving user root iteratively in share controller

There was a performance problem that with many shares, the "share tab" was slow
to display entries. Now the performance of displaying that tab should be better
as we avoid retrieving the same information for all the shares

https://github.com/owncloud/enterprise/issues/4107
https://github.com/owncloud/core/pull/38055