A temporary css cleanup to hold us over till a proper css overhaul.
Summary: Ref T8187, A temporary css cleanup to hold us over till a proper css overhaul.
Test Plan: Mostly, confirm that long event names don't break the calendar month view.
Reviewers: chad, #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T8187
Differential Revision: https://secure.phabricator.com/D12908