[web] Style navigation state info in the top bar
Summary:
issue: https://linear.app/comm/issue/ENG-2740/add-navigation-state-info-to-the-top-bar
Styling the nav state info according to the designs: https://www.figma.com/file/a1nkbWgbgjRlrOY9LVurTz/Comm-%2F-Desktop-app?node-id=7780%3A136895&t=zg5f0X86eUyYnqI7-4
Test Plan: Run web app, check that the navigation state info in the top bar displays correctly
Reviewers: kamil, michal, bartek
Reviewed By: kamil
Subscribers: ashoat, tomek, atul
Differential Revision: https://phab.comm.dev/D6845