use shorter fa4 class for forkawesome

Revert "use shorter fa4 class for forkawesome"

This reverts commit 481df9696ea7e89921c7c2e676c122efea601a3a.

use shorter fa4 class for forkawesome

normalize feed footer

footer: add back-to-top

posts: add 2021-04-16-kubeadm-psp

fix code theme on light

add matrix link

fix greedy hidden hover

masthead: css cleanup

fix author url popup color

adjust navicon height

greedy nav: remove debug custom attr

greedy nav: remove debug custom attr

greedy nav: remove timeout

bad ux imo

fix greedy overflow position and color

masthead: fix greedy toggle position

masthead: merge css

masthead: cleanup yet another div

masthead: cleanup another div