Summary:
This commit adds the ability to perform event search in the calendar window.
To achieve this, SearchBar has been moved from the thread-search package to be a part
of the nylas-component-kit, and reused by both thread-search and nylas-calendar
When an event is selected from search results, the calendar view is moved to the selected
event. Depends on D3396 to open the event popover.
Test Plan: Manual
Reviewers: halla, bengotow
Reviewed By: bengotow
Differential Revision: https://phab.nylas.com/D3424
