* Fix - Slots remaining not showing when displaying times in visitor's timezone.
* Fix - Skip missing cost rules when deleting a cost rule from the middle of the table.
* Fix - Do not send reminder if booking has passed.
* Fix - Ensure min and max duration is always 1 for products with fixed duration.
* Fix - Reminder email not sent on partially paid booking with deposits.
* Fix - When multiply by person is enabled, calculation is not correct.
* Tweak - Add a filter that allows altering google calendar poll interval.
* Tweak - Increase google calendar poll interval.
