Fix event pagination in month views
Summary: Closes T7927, Fix event pagination in month views.
Test Plan: Querying for events in month view should display max that month's events and min the subset of days selected.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7927
Differential Revision: https://secure.phabricator.com/D12661