NP. Suppose to save NavigationBar space and lightweight - all reply’s authors names better to display on rollover over each mark or over NavigationBar (this function can be improvement with smart authors names aggregation with arrows later). In-topic search can add the new “SearchResult” mark with correspond Shortcut “Search result prev/next”. "There are can be many different visual variants, but any of them will make NavigationBar MUCH more useful!
