Use dot notation in some places
Summary: Use x.y in favor of x['y'] in some JavaScript callsites. Note that there are a bunch of places where the latter is explicitly used to trick PhabricatorJavelinLinter.
Test Plan: arc lint
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11442