impr: optimize use of fontawesome (fehmer)

[fehmer]

Reduces the size of fontawesome by approx 90%.

current sizes

file	size
fa.min.css	13.2 kB
fa-solid-900.woff2	79.9 kB
fa-brands-400.woff2	77.2 kB
total	170.3 kB

optimized sizes

file	size
fa.min.css	2.6 kb
fa-solid-900.woff2	13.1 kB
fa-brands-400.woff2	1.6 kB
total	17.3 kB