Merge pull request #23398 from owncloud/block_group_sharing

apps/files_sharing/api/share20ocs.php

apps/files_sharing/api/sharees.php

apps/files_sharing/appinfo/routes.php

apps/files_sharing/tests/api/share20ocstest.php

apps/files_sharing/tests/api/shareestest.php

build/integration/features/bootstrap/ShareesContext.php

build/integration/sharees_features/sharees.feature

core/js/config.php

core/js/shareconfigmodel.js

core/js/sharedialogview.js

lib/private/Share20/Manager.php

lib/public/share/imanager.php

settings/admin.php

settings/js/admin.js

settings/templates/admin.php

tests/lib/share20/managertest.php