First step towards a Javelin behavior for Calendar day view
Summary: Ref T8300, First step towards a Javelin behavior for Calendar day view
Test Plan: No user facing changes.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T8300
Differential Revision: https://secure.phabricator.com/D12978