Adds Polish translations

 - Provides translations mostly for SetupWizard
 - Makes title of error panel translatable

### Proposed changelog entries

### Submitter checklist

- [ ] JIRA issue is well described
- [ ] Changelog entry appropriate for the audience affected by the change (users or developer, depending on the change).
- [ ] Appropriate autotests or explanation to why this change has no tests
- [ ] For dependency updates: links to external changelogs and, if possible, full diffs

### Desired reviewers
@batmat