Ah, that’s because the header icons widget doesn’t have a property that can be accessed that shows when topic info is being displayed (attrs.minimized for home-logo, attrs.topic for header). That’s a good point, I’d forgotten about that.
But maybe you can just use the home-logo:after decoration from the first post and reposition the links to be near the search bar anyway, right? Just fiddled around with a bit and wasn’t having much luck, but could just be failing at css. 