Calendar event monograms, part 2. Calendar event monogram should appear in the object crumbs and page titles.

Summary: Ref T7928, Calendar event monograms, part 2. Calendar event monogram should appear in the object crumbs and page titles.

Test Plan: Create calendar event, event details page should show a clickable crumb, E{id}, and clicking edit should show a page where the crumbs show E{id} > Update Event

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T7928

Differential Revision: https://secure.phabricator.com/D12579