Reset button not working

[twocaretcat]

The reset link is broken in two ways:

• The inline JS link breaks the script-src Content Security Policy directive (this has been fixed in Port to manifest v3 #17)
• The data attributes to store the original font of page elements don't seem to exist, so when the resetFont() method is called, it is setting font-family to undefined on all those elements instead of restoring the original fonts