[web] Add password section

Summary:
Display a password section with a button that allows editing it. The editing will be implemented in one of the future diffs.
https://www.figma.com/file/a1nkbWgbgjRlrOY9LVurTz/Comm-%2F-Desktop-app?node-id=1272%3A88750

Depends on D3322

Test Plan: Display a page and check if it is rendered correctly.

Reviewers: benschac, atul, def-au1t

Reviewed By: atul

Subscribers: ashoat, Adrian, karol-bisztyga

Differential Revision: https://phabricator.ashoat.com/D3323