v1.2.0

Refactoring of authentication in frontend and minor improvements

• Fix race between WebAuthn and Extension on login (#45)
• Fix transition for Messages (#fd82e13)
• Performance improvements
  • lazy loading of components
  • reducing time to first backend request
• moved from css to scss to reduce resulting css size
• Add HTTP headers (Content-Security-Policy, Content-Disposition, HSTS)
• Apply SameSite=strict to cookies
• add server side logging