don't traceback when server doesn't have SSL support. Fixes #7322
don't run several GPG threads when we receive a non-GPG message. Fixes #7311
make FakeDataform instructino label selectable. Fixes #7331
prepare 0.15.4 release
translate also files in src/command_system/*.py. Fixes #7324
use GED to send messages via gajim-remote. Fixes #7321
Added tag gajim-0.15.4 for changeset 4fd195463911