Black thumbs in processing queue

[Paul Matthijsse]

Hello, I noticed this recently (latest versions of Art). In the navigator I select some thumbs and say Send to queue. When I look in the queue, the thumbs are there. Now I select some more and send them to queue. But these thumbs are black, see screenshot. Only when I quit Art and restart, they show up.

Xubuntu 20.04.3.

[agriggio]

fixed thumbnail refresh in the batch queue

Fixed #232

→ <<cset 30195b3c138a>>

[Paul Matthijsse]

Works again, thanks!