Optimize svg files files/usr/lib/cinnamon-settings/data/icons/themes.svg

*This file visually differs slightly*
*Not optimized to fullest, some transformation exist*

files/usr/lib/cinnamon-settings/data/icons/themes.svg Change size from 67807 to 43800 bytes.(64.59% of original size)

Total 64.59% of original size.
24007 bytes saved.