R1:14af40afa09e

Calendar day view should have forward/back controls to scroll through days

Summary: Ref T4393, Calendar day view should have forward/back controls to scroll through days

Test Plan: Open day view on first or last day of the month, scrolling backwards or forwards through days should correctly calculate the date of the next day and the previous day and correctly find events.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest…