I think you probably have Marlin installed. However, it's a bad practice to use that kind of generic IDs in setting schemas. "org.pantheon.files.view-mode" would be more correct in order to avoid conflicts.
I think you probably have Marlin installed. However, it's a bad practice to use that kind of generic IDs in setting schemas. "org.pantheon. files.view- mode" would be more correct in order to avoid conflicts.