* Fix - Resolved an issue where users could not be enrolled in a Free course after registration when the 'Modern' registration appearance is activated.
* Tweak - Added filters: `learndash_model_product_supports_coupon`.
* Fix - Resolved an issue where quiz resume didn't work when the saved answer had a line break or similar characters within it.
* Tweak - Deprecated functions: `learndash_prepare_quiz_resume_data_to_js`.
