I don't believe it's a script. It's an unzipped folder of images with specific png names to override default using PatchImagesPath in the XY ini file:
PatchImagesPath=Skin\Mosaic\mosaic.bright
It happens with the Onyx skin, too. The filename is cut.png. That appears to be the proper name to override the Cut toolbar icon, yet it remains default. It's driving me nuts not being able to figure this out.
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