R1:973101cae6c7

Correctly display event id and sequence in crumb and page title on eventviewcontroller

Summary: Fixes T8459, Correctly display event id and sequence in crumb and page title on eventviewcontroller

Test Plan: Open `E111/3`, crumb and title should display '`E111 (3)`' instead of '`E111`'.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8459

Differential Revision: https://secure.phabricator.com/D13211