Merge branch 'settings-and-filtering' into shigusegubu

* settings-and-filtering:
  Use proper setting name
  Use cleaner instance config check for shoutbox setting
  Make locale language cleaner
  Don't shorten shoutbox to SB
  Fix lint error
  Update CHANGELOG.md
  New option: Hide shoutbox

src/modules/config.js

@@ -21,6 +21,7 @@ export const defaultState = {
   customThemeSource: undefined,
   hideISP: false,
   hideInstanceWallpaper: false,
+  hideShoutbox: false,
   // bad name: actually hides posts of muted USERS
   hideMutedPosts: undefined, // instance default
   hideMutedThreads: undefined, // instance default