[GSoC'22] Bulk renamer enhancement

MR for issue #108 (closed)

TODO

• Store the failed pairs
• Implement the first run on failed pairs
  • Sort the pairs in ascending order of names
  • Run the bulk renamer on sorted pairs
• Implement the second run on failed pairs
  • Sort the pairs in descending order of names
  • Run the bulk renamer on sorted pairs
• Manual testing
  • Pairs Undo failing