Woocommerce Sensei LMS 2.4.0

* New: Better support for non-Sensei themes
* New: Redirect to next lesson after completing a lesson
* New: Show comments for preview lessons
* New: Add `sensei_course_image_html`Â filter to enable altering HTML output of a course image
* Tweak: Start lesson when student first views lesson page
* Tweak: Remove _Single Course page displays_ setting
* Tweak: Minify sensei.css
* Tweak: Upgrade Select2 to latest version
* Fix: Bulk Learner Actions showing all users in the network
* Fix: JavaScript error on Lessons page

* Fix: Fix error in data updates when there are no quizzes
* Tweak: Add setting for data deletion

* Fix: Fixes associating courses after purchase of a variable subscription product
* Fix: Allow certain HTML tags on quiz correct answer result
* Fix: Fix number parameter not working for [sensei_user_courses] shortcode
* Fix: Ensure answers to true / false questions are translated for students
* Fix: Fix PHP notices when viewing or adding a lesson and there are no courses
* Fix: Fix PHP 7.2.x warnings
* Fix: Fix get_class warning on PHP 7.2.x
* Fix: Check if WC_VERSION constant is defined before using it
* Fix: Fix CSS class name translation
* Fix: Hardcode DAY_IN_SECONDS to avoid continuous sending of data on old WP installations
* Fix: Fix PHP notices when purchasing non-course product as a guest
* Tweak: Remove WooThemes branding on settings page
* Tweak: On single course page, link to module only if we should
* Tweak: Conditionally link to module in lesson breadcrumb
* Tweak: Exclude modules from course navigation when not appropriate
* Tweak: Send usage data immediately when enabled through opt-in dialog
* Tweak: Clean up extended settings in Gutenberg Lesson editor
* New: Delete plugin data on uninstall
* New: Add revisions support to courses, lessons and questions
* New: Add sensei_start_course_redirect_url filter when starting course
* New: Add usage tracking for active and completed courses
* New: Show lesson tags in Gutenberg editor
* New: Add usage tracking for system info