Allow ajax to be used for filters in ^4.2

I have a calendar with a few user-enabled filters. But currently if a user is on a different view (say "List"), and then uses a filter, the page will refresh the page to apply the filter showing on the default (e.g., "Month") view.

It would be great if filters could also be ajaxified to not need a full page refresh. This worked in 2.0, but when Ajax is enabled for the view in ^4.2, applying a filter will break the calendar showing the weird "language select" button only.