Checkmark doesn't show when cell selection is changed

[themiddle]

Steps to reproduce:

1. Present RecurrencePicker view controller as a modal view controller
2. Select a non-custom recurrence time (for example, "every two weeks")
3. Notice that the checkmark does not change
4. Click the done button to dismiss
5. Open RecurrencePicker again, notice that newly selected time ("every two weeks") has the checkmark