[Feature request] Batch processing multiple settings

[Arkbird1000]

I often find myself processing the same image or images in batches using multiple settings for the same engine (eg. with different denoise settings or different models) to compare the outputs. The ability to do all of those operations at the same time instead of in small batches could make for a nice enhancement. Perhaps this could be done with checkmarks for each image in the queue or by using something similar to the existing Custom Resolution option?

I currently use a script based around waifu2x-converter-cpp that I kludged together to do this (and do custom file naming based on the processing variables) but it is nowhere near as versatile as this amazing program you have.