Actually store the login details under the selected profile

Loren Burkholder authored 4 years ago and Loren Burkholder committed 4 years ago

This introduces a new version of SingleApplication as well.

This fixes some lag, when Nheko is running, which could affect Nheko and
even other applications by excessively calling fsync. This should be
fine, since all filesystems seem to guarantee order and in most cases,
the modified pages are still written. In the worst case we should only
lose the last /sync results or similar.

Don't send inbound session to self and claim and send all keys at once.

The loss in durability shouldn't matter, if we can just receive the same
events again after a restart