If you right clic Collection > Properties , we can change icon.
If you choose icon with alias (e.g. /home/dopus.exe), icon is not display in Lister (generic icon is display).
But if you choose real path (e.g. E:\DOPUS\dopus.exe), it's ok.
Sorry to up this post, but can you look at this...
That will work in 12.0.12.