Wrong sorting with Album.ignore.sort

[simoncn]

I think there is a better solution. For ignore.sort (only), the separator would be ' ! '. For all other ignore settings (ignore.index, ignore.display, ignore.index.sort, ignore.display.sort and ignore.index.display), the separator would be ', '. This fixes the sort order problem originally reported by the OP without showing an ugly index value or display value.