3.1.6466 - Thumbnail browser empty panel for empty values

[Xenatier]

In the column browser when displaying genres for example, it will have a panel for [unknown] files that have no genre tag. On the thumbnail browser however, it just has an empty panel instead of saying [unknown].

[Steven]

I am not sure I agree this is a bug but for v3.2 have changed the display so its consistent with the column browser