[Controller-Owned Networking] App crashes on inserting and deleting recordings

[gloomikon]

Fix:
In FolderViewController folder property is a struct, so in methods deleteItem(item:) and insert(item:) changing the folder property will trigger didSet block with tableView.reloadData().

Therefore, tableView.deleteRows(at: [IndexPath(row: index, section: 0)], with: .automatic) and self.tableView.insertRows(at: [IndexPath(row: self.folder.contents.endIndex-1, section: 0)], with: .automatic) are redundand and provoke a crash.
Deleting these lines should fix it