Fixes#2004. Two review rounds; findings and evidence on the PR. Verified by injecting the stylesheet into a running deployment and reading computed styles before and after: the badges gain background, size, uppercase and padding; at 430px the Config column stays visible; the sorted column keeps its accent. The new test fails on the eight unstyled classes against the pre-fix tree, on .ns-truncated against the first fix, and on a re-added column-hiding rule.
