[BUG] Parallel Encode Progress Display

[Ichisich]

In case multiple files get encoded parallelly instead of chunking, NEAV1E loses the progress as soon as the first file finishes encoding.
The number of files/workers doesn't matter, the bug even happens with only 2 parallel encodes.

Fortunately, the Video itself is unaffected, only the optic feedback in the NEAV1E GUI is pertained.

The queue works correctly as long as all files are processed:

As soon as one file (in this case 4c) finishes, the other progress bars get greyed out:

The finished queue:

P.S.
The bug already happened with 2.0.6, so it's not a regression.

[Alkl58]

Fixed in Release v2.0.8