[X] Auto Numbering Wizard Total Track Count

[poster]

Due to the .m4a codec in Mp3tag, files in the TRACK field do not show "/20" or "/30" which equivelates to the "of 20" or "of 30" part in iTunes - .mp3 files on the other hand will show these once the metadata has been added to them in mp3tag.

Indeed.
But with m4a-files the autonumbering wizard fills the tag TOTALTRACKS instead of this.