Code review comment for lp:~sladen/unity-2d/unity-2d-no-glow-lp933578

We need a way to indicate focus on the "Filter results", it was only being highlighted with the glow, now it's too easy to get "lost" in the dash when keyboard-navigating.

We have a similar issue with category headers that don't have "expand" links, so consistency here would probably make sense (not "it's broken" consistency, but a way to indicate focus on them).