FontAwesome 5 not backwards compatible, broken glyphs in most scripts using FontAwesome 4

[kb100]

This is a PSA to anyone whose bar looks messed up when upgrading to FontAwesome 5. I haven't come up with a good solution yet, but some quick fixes are: for each script change the name of the font FontAwesome to FontAwesome5Free in the script, and if that doesn't work, copy and paste the glyph from the FontAwesome website into the script. Feel free to investigate and let me know what a good solution is (hopefully that works both for people who haven't upgraded and those who have).