Add a new default filter that dithers a wallpaper image to the web safe color palette#679

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peteroupc wants to merge 2 commits intovarietywalls:masterfrom peteroupc:websafe

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Commits on Feb 4, 2024

Change wallpaper filter output format to PNG from the lossy JPG; lossy formats undermine the effect of certain ImageMagick filters, such as those that reduce the image to a specific color palette
peteroupc
committed
Add default wallpaper filter to dither the image to the so-called Web safe color palette
peteroupc
committed