Summary:
write tests for adding/removing existing labels and popover closing
add more tests
address code review comments
fix the tests
add test for creating label
add test for creating label and queueing change label task
add test for creating a folder
add syncback category task spec
make the rest of the tests pass
remove unnecessary parens
add a few more tests
add last test
Test Plan: added some tests. all tests green
Reviewers: bengotow, evan
Reviewed By: evan
Differential Revision: https://phab.nylas.com/D2010
