Getting-Started column customisation (panel, notice)

...ascript/flavours/glitch/features/getting_started/index.js

...pt/flavours/glitch/features/getting_started_misc/index.js

...ipt/flavours/glitch/features/ui/components/link_footer.js

app/javascript/flavours/glitch/reducers/index.js

app/javascript/flavours/glitch/reducers/pleroma.js

app/javascript/flavours/glitch/styles/components/index.scss

app/javascript/mastodon/actions/pleroma.js

app/javascript/mastodon/locales/en.json

app/javascript/mastodon/locales/fr.json

app/javascript/mastodon/reducers/index.js

app/javascript/mastodon/reducers/pleroma.js

app/javascript/styles/mastodon/components.scss