v1.5.9-rc.1

Full Changelog

• Upgrade JS SDK to 5.0.0-rc.1 and React SDK 2.1.0-rc.2
• Update from Weblate
  #12354
• Add top left menu shortcut
  #12310
• Remove modernizr rules for features on which we only soft depend
  #12272
• Embed CSP meta tag and stop using script-src unsafe-inline
  #12258
• Add contribute.json
  #12251
• Improve Browser checks
  #12232
• Document padlock flag
  #12173
• Enable cross-signing on /develop
  #12126
• Switch back to legacy decorators
  #12110
• Update babel targets
  #12102
• Install deps for linting
  #12076
• Update from Weblate
  #12062
• Change to minimal Webpack output
  #12049
• Remove docs for new invite dialog labs feature
  #12015
• ElectronPlatform: Add the indexSize method.
  #11529
• ElectronPlatform: Add the ability to load file events from the event index
  #11907
• Fix the remainder of the cookie links
  #12008
• Use bash in Docker scripts
  #12001
• Use debian to build the Docker image
  #11999
• Update cookie policy urls on /app and /develop config.json
  #11998
• BuildKite: Only deploy to /develop if everything else passed
  #11996
• Add docs for admin report content message
  #11995
• Load as little as possible in index.js for the skinner
  #11959
• Fix webpack config (by stealing Dave's config)
  #11956
• Force Jest to resolve the js-sdk and react-sdk to src directories
  #11954
• Fix build to not babel modules inside js/react sdk
  #11949
• Fix webpack to babel js-sdk & react-sdk but no other deps
  #11944