Whitespace cleanup

apps/files/admin.php

apps/files/css/files.css

apps/files/js/filelist.js

apps/files/js/files.js

apps/files/templates/part.list.php

apps/files_external/ajax/addRootCertificate.php

apps/files_external/ajax/removeRootCertificate.php

apps/files_external/lib/config.php

apps/files_sharing/lib/share/folder.php

apps/files_sharing/public.php

apps/files_versions/js/versions.js

apps/files_versions/lib/versions.php

lib/app.php

lib/connector/sabre/directory.php

lib/connector/sabre/principal.php

lib/db.php

lib/fileproxy/fileoperations.php

lib/image.php

lib/migration/content.php

lib/ocsclient.php