Addition of a "Yes, don't ask again" option in case of a "...lot of memory" prompt

[RanyAlbegWein]

Thank you for a great plugin!

When being prompted for "Copying such a big image could be slow and may take a lot of memory. Proceed?" It would be nice to have a "Yes, don't ask again" option, allowing for a smoother experience when taking multiple screenshots.

Thank you! thumbs up