Log Message:
texttest: update to 4.3.1. Changes:

New development:
- New knownbugs option to report as known bug even if all reruns fail
  (extra checkbox in the UI)

Bugfixes:
- Standard error files should always have highest display priority
  unless overridden (some tools truncate preview output and lose
  stacktraces etc)
- Make spin buttons reset correctly, irrespective of locale
- Removed very old hack that caused problems on Linux testing with
  UIs visible
- Fixes for AZ Devops integration - count Rejected/Removed bugs as
  completed, don't fail if Severity not present (so we can link to
  Features/User stories etc)
- Fixed selection of fastest/slowest tests (thanks Nils Olsson)
- Compatibility with Python 3.11
- Fix for partial approval of a test with custom test comparison