* Remove refs to deprecated method
`MatrixEvent.isEncryptedDisabledForUnverifiedDevices` is now deprecated
* Report new posthog code for withheld message keys
* Use different messages for UTDs sent before login
* Playwright test for historical events
* Add some tests
* initial work on pre-join UTDs
* add playwright tests and remove old pre-join UTD logic
* run i18n script
* fix type error
* use different error code in PostHog for pre-join UTD
* don't remove old pre-join UTD logic yet
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Co-authored-by: Richard van der Hoff <richard@matrix.org>
* Use different messages for UTDs sent before login
* Playwright test for historical events
* Add some tests
* Don't show "verify" message if backup is working
* Apply suggestions from code review