Multiday events

[asavin]

Motivation

Currently it is only possible to specify datetime of the event. With this change we are introducing ability to specify start datetime and end datetime. Events spanning multiple days will have those days displayed in the UI (under Today list).

• [x] Event stays in “Upcoming” list, using the first day of event for order.
• [x] When the first day of event is today, move to “Today” list. Still showing the same date range
• [x] When the last day of event is gone, move to “past” list. Use the last day of event for order.
• [x] Tests
• [x] Gif added

[AndrewBestbier]

Looks good :)

[asavin]

@AndrewBestbier merge merge!