Making an iconset involves saving the iconset to the current folder, the dis filetype has had a label filetype icon assigned to it
when overwriting the dis file with a new one the file icon looks like this
until refresh is clicked
That’s what the refresh button is for. 
Restarting Opus also works, if that’s essier.
hmmmmmm! Would prefer it to do it automatically, like it has been instructed to do.
new thumbnail drawing routine:
if label assigned use label