Upgrade to Font Awesome v5

[taylortom]

...for more icon goodness 🔥

[Link2Twenty]

Upgrade guide: https://fontawesome.com/how-to-use/on-the-web/setup/upgrading-from-version-4

Version 5 has been re-written and re-designed completely from scratch.

Everything has changed 🎉😁

[Link2Twenty]

In the hbs files, we have 36 unique icons, 27 of which work fine in FA5.

I've made a list of them all and included the new names for the missing ones below it.

https://jsfiddle.net/link2twenty/dcqwo50t/

https://github.com/adaptlearning/adapt_authoring/search?l=Handlebars&p=1&q=fa

[taylortom]

That's very useful, thanks @Link2Twenty!