Skip UI tests on CI until we have a fix.

Update COPYING-DOCS from GNU website (#152)

Save lines when checking for binaries in download-translations

Prepend GHA problem matcher to errors and warnings

Add missing languages from Translation Project

Use LANGUAGES_UPDATED only for updated, improve the output text

Fix check for necessary binaries

Fix download-translations

Remove the xvfb-run again.

Archive the logs for the artifact step.

Try running UI tests with xvfbrun.

Aaaaand always run it.

Try outputing the test summary.

Add last missing doc-string.

Fix my regression (b7d25b0) in sequence loop end/play end handling.