Create more tests for the events view

[andybroomfield]

• [ ] Make sure events in the past are not displayed by default
• [ ] Make sure events in the past not shown when changing other filters (not filtering by date)
• [ ] Make sure no past events are shown during pagination
• [ ] Make sure no error message is shown if no date selection widget (choose, today, tommorow, this week, this month, next month) is selected (as that is just to set the actual date filter.