Summary:
still WIP, but functionality is there.
TODO:
[x] write tests
[x] swap out the current markasread icon for the correct markasread icon that @sdw is making
[x] figure out how to address this point by @bengotow: https://phab.nylas.com/D2024?id=19139#inline-12168
Test Plan: tested manually. still need to write tests though.
Reviewers: evan, bengotow
Reviewed By: bengotow
Subscribers: sdw
Maniphest Tasks: T3483
Differential Revision: https://phab.nylas.com/D2024
