Allow views AJAX history to be updated by (facet) checkboxes

Reroll for latest version.

Won't this then apply also to non-facets? Ie, if I:

1. Create a view with exposed filter for a taxonomy reference field
2. Use better exposed filters to set that exposed filter to display as a series of checkboxes
3. Click a checkbox using the view

If the Views Exposed Form is not using auto-submit, I would expect it to not add to the history state until I click apply. So I believe this code needs to opt-in via the Facet settings?