Redesign about:preferences#tor following user feedback

about:preferences#tor has been the subject of considerable user testing and feedback during the past few years. We should keep this feedback in mind when it comes to implementing changes to the front-end to support Connection Assist, with the end-goal to improve the ease and likelihood that users circumvent censorship by successfully configuring Tor Network settings.

Related docs

• User flows: Figjam board (includes intended logic for Tor Network settings)
• Desktop UI: Figma link

Secondary tasks

• Design card providing a snapshot of the “active” bridge in about:preferences#tor
• Design “Select a Built-In Bridge” modal and user flow