Steps to reproduce:
(1) Open scheduler demo
(2) Go to month view
(3) Click on one of the first days of the month and drag the mouse to another day at least 2 rows below it
(4) Click `Save` on the popup to save this event
The new event correctly shows up covering all the days of its duration.
The new event shows up covering only the days on the first week of its duration.
Note: This regression was caused by some changes done for performance by
AUI-1772, which changed the logic of how month view events are rendered.