Fix link highlight
Fix link highlight

There was no focus-visible style on the error link. It's now provided by
.devtools-link.

After: https://imgur.com/a/kpKCkrC

Fixed: 1159321
Change-Id: I8ecc9ad5fadb9dcec919a47caf50495bfc6ab49e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2599736
Reviewed-by: Mathias Bynens <17a2cbc4e33156874a9862b0f530521117e66a3d@chromium.org>
Commit-Queue: Mathias Bynens <17a2cbc4e33156874a9862b0f530521117e66a3d@chromium.org>
Auto-Submit: Peter Marshall <6d0eecbeb7fb9d172f49b4b32481d2466fd89429@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend