Port ba917e15f6 to glitch-soc

Port 74dae9458d and related to glitch-soc

glitch-soc-style still in backup, both sharing the same SCSS style

Port 53b1d88873 to glitch-soc

Port 597948fb13 to glitch-soc

Inspired from b6003afcdb but using component
properties instead of redux store for hidden/revealed state.

Port 08e4c78e78 to glitch-soc.

SCSS fix inspired by 69f13e7bca.

Port ff7941e652 to glitch-soc

It was currently full-size

Port the video-player part of 036dd98abb to
glitch-soc. MediaGallery part ignored since it has diverged quite a bit.

This fixes #423

Port 31e7b73084 to glitch-soc

Port f691afaae9 to glitch-soc

Port fa5c867e0e to glitch-soc

Port 4e929b2d17 to glitch-soc

Port 86a9de6753 to glitch-soc

Port of 38b9af76a2 to glitch

Port 5131012505 to glitch

Ports 219aac7800 to glitch-soc

Port 379cdfaac5 to glitch-soc flavour

Port 41a01bec23 to glitch-soc

This makes the clickable element an interactive element, but doesn't add
alt text and makes it not-obvious that you can click the elefriend.  On
one hand, this goes against good practice; on the other hand, it's not
*supposed* to be obvious that you can click the elefriend.

Also lay some groundwork needed to interactively change the
glitchfriend.

The codebase uses "elefriend" because it's shorter and didn't require me
to realign the actions in actions/compose.js.  Same idea, though.

Glitched elephant friends kindly provided by @ncls7615.