Summary:
Move the old bar notifications to the sidebar, and only display one notification
at a time using a priority-rating system. Remove all of the old notification
infrastructure.
Test Plan: Added specs, also reproduced notifications locally
Reviewers: bengotow
Reviewed By: bengotow
Subscribers: juan
Differential Revision: https://phab.nylas.com/D3310
Summary: Ran into issues with the selected tag having different styles associated with it in taiga and in darkside. Fixed these.
Test Plan: Tested on my machine
Reviewers: jackie
Reviewed By: jackie
Subscribers: jackie
Differential Revision: https://phab.nylas.com/D3144
