NEW:
- new UI languages: Hungarian, Galician
- Author metadata: now collecting birth/death dates and a picture; shown on the "All works by this author" screen.
- Bedetheque: find the correct edition for older comics.
- "Update books": the description field can now append text.
- improved scrollbar accessibility + added tap-to-jump

FIXES:
- performance
- 7.4.1: fix duplicates images in backup