Merge pull request #22613 from owncloud/quota-changedavreturnvaluewhennoquotaset

apps/dav/lib/connector/sabre/directory.php

apps/dav/tests/unit/connector/sabre/directory.php

apps/files_sharing/lib/sharedstorage.php

build/integration/features/bootstrap/Provisioning.php

build/integration/features/bootstrap/Sharing.php

build/integration/features/bootstrap/WebDav.php

build/integration/features/webdav-related.feature

lib/private/helper.php

settings/personal.php