Show test result in task if any test result is recorded.
Extend description with more build results
Fixed in https://issues.jenkins-ci.org/browse/JENKINS-30051
I also think this would be a really nice feature, though perhaps not exactly like in the screenshots - I really like the current flat background status colors.
It would also be nice to be able to hover over the task to get a more descriptive text. See proposed hover text in the attached screenshot.