lib: Modify FileInfos consistently (ref #6321) (#6349)

lib/model/folder_recvonly.go

@@ -104,14 +104,8 @@ func (f *receiveOnlyFolder) Revert() {
 				return true // continue
 			}
 
-			fi = protocol.FileInfo{
-				Name:       fi.Name,
-				Type:       fi.Type,
-				ModifiedS:  time.Now().Unix(),
-				ModifiedBy: f.shortID,
-				Deleted:    true,
-				Version:    protocol.Vector{}, // if this file ever resurfaces anywhere we want our delete to be strictly older
-			}
+			fi.SetDeleted(f.shortID)
+			fi.Version = protocol.Vector{} // if this file ever resurfaces anywhere we want our delete to be strictly older
 		} else {
 			// Revert means to throw away our local changes. We reset the
 			// version to the empty vector, which is strictly older than any