* Add endpoint to hide task lists
* Migrate old setup task list hidden option
* Use option to store all hidden lists
* Add getter for deprecated options
* Migrate old task list options
* Move task lists into separate class
* Add TaskList class for individual task list control
* Update hidden checks to use TaskList api
* Update docs for hidden lists
* Update use of should_show_tasks to check for visible task lists
* Remove hide endpoint to reduce scope on PR
* Fix up failing tests
* Fix up rebase
* Add back in should_show_tasks with deprecation notice
* Add delay between payment tests
* Add default free extensions to REST API response
* Use data store to retrieve free extensions
* Add back in product link click tracks
* Handle visibility and evaluation server-side
* Update sprintf to use entire link tag
* Fix up remote free extensions rule evaluation
* Add visibility rules to mailpoet
* Fix fallback to default payment gateways if polling fails
* Add changelog entry
* Fix empty array check
Co-authored-by: Matt Sherman <matt@jam123.com>