Bug fix: abilities were invisible until unlocked

Abilities are now visible.

opacity:50% in our CSS changed to opacity:1% in the release build. (https://github.com/facebook/create-react-app/issues/7980) Sorry about that. If you want to fix it, you can either fix it in build/static/css/main.83228efb.chunk.css manually or you can use https://alasala.ew.r.appspot.com/ui which now has this fix. (Otherwise it's the same as the uploaded final version, just with Google authentication instead of a hardcoded user.)