#71 Splitted archive volumes are treated as different books
If there is a splitted rar archive (e.g. archive.part1.rar, archive.part2.rar etc.) all these archives are currently treated as different books. That is, if you are in archive.part1.rar and use PgDown at the end of the book to go to the next one, the "next" one is archive.part2.rar which results in the very same book being opened again.
I think that for rar archives, all *.part[0-9]+.rar files except *.part1.rar should be ignored. Likewise, for 7z archives, files named *.7z.[0-9]+ excluding *.7z.[0]*1 should be ignored as well. The same goes for any other archive format that supports splitted archives.
Similarily, when using PgUp or PgDown for switching between books, the splitted 7z archive is skipped. (That is, if I start in a splitted 7z archive, use PgDown to go to the next book and use PgUp afterwards, I don't get back to the splitted 7z archive I opened.) Looks like MComix ignores *.7z.001 files when searching for the next/previous book.