Fixes #313, #283, #322, #127, #334

We use very little functionality of it anyway.

Co-authored-by: Christophe HAMERLING <chamerling@linagora.com>
Co-authored-by: Klemens Arro <klemens.arro@admcloudtech.com>
Co-authored-by: Goran Urukalo <goran.urukalo@teletrader.com>

The deployment will generate the right one based on the provided name
and email.

Fixes: https://github.com/jitsi/jitsi-meet-electron/issues/379

This avoids any problems caused by the initialization of any of the
extra services initialization failures.

Fixes: https://github.com/jitsi/jitsi-meet-electron/issues/380

* Fixes #369

Fixes: https://github.com/jitsi/jitsi-meet-electron/issues/371

Update frame-ancestors note.

Fixes a crash when H.264 is used (in P2P mode).

Electron 9 ships with Chrome 83 which means we have access to E2EE by
enabling experimental web platform features.

Don't use abotars, as they are no longer used in Jitsi Meet.