v1.5.4-rc.1

Full Changelog

• Add doc for custom themes
  #11444
• Use new theme API in react-sdk
  #11442
• preload warning triangle
  #11441
• Update from Weblate
  #11440
• Add entitlements file for mic & camera permissions on macOS
  #11435
• Fix error/exception in electron signing script
  #11429
• Merge the feature_user_info_panel flag into feature_dm_verification
  #11426
• Let the user's homeserver config override the build config
  #11409
• Add cross-signing labs flag to develop and document
  #11408
• Update from Weblate
  #11405
• Trigger a theme change on startup, not just a tint change
  #11381
• Perform favicon updates twice in Chrome
  #11375
• Add labs documentation for Mjolnir
  #11275
• Add description of user info feature in labs doc
  #11360
• Update from Weblate
  #11359
• Add DM verification feature to labs.md
  #11356
• Add feature_dm_verification to labs
  #11355
• Document feature flag process
  #11341
• Remove unused feature flags
  #11343