Auto select entries with incremented file name

[pavelskipenes]

If a user would download the file file.txt multiple times, they would be named file.txt, file (1).txt, file (2).txt and so on. flones-gui should auto select all files for deletion if the file content is the same and if the file name is incremented. This could also be applied to extracted directories. A "top level" directory would be incremented the same way while the remaining directory structure would remain the same.