See https://gitlab.gnome.org/GNOME/libsecret/-/issues/49

fixes #816

This was a bit of a journey:
https://github.com/matrix-org/matrix-doc/pull/3471
But it should work now and we now use the UIAHandler everywhere.

fixes #670

Add support for listing devices that do not support encryption, add support for logging out devices.

Ticks off another box in #23!

Showing the bootstrap state and showing there are unverified devices is
still missing.

fixes build with new libolm

relates to #658

fixes #562

Requires flatpak 1.11.1

fixes #558