Draft: Multiprocessing
Added the ability to upscale multiple images in one application window, using a queue overview.
Marked as draft for now, since the changes are quite complex and are bound to contain small bugs and room for optimization.
Parts of the UI, especially text, can still be improved as well.
Mypy throws some errors that I'm not sure yet how to fix.
Here's a screenshot of the queue overview:
Edited by Gregor Niehl