v1.7.11-rc.1

Full Changelog

• Upgrade to React SDK 3.7.0-rc.2 and JS SDK 9.0.0-rc.1
• Update Weblate URL
  #15516
• Translations update from Weblate
  #15517
• Jitsi accept theme variable and restyle
  #15499
• Skip editor confirmation of upgrades
  #15506
• Adjust for new widget messaging APIs
  #15495
• Use HTTPS_PROXY environment variable for downloading external_api.min…
  #15479
• Document customisation points
  #15475
• Don't fatally end the Jitsi widget when it's not being used as a widget
  #15466
• electron-platform: Pass the user/devce id pair when initializing the event
  index.
  #15455