Woocommerce Sensei LMS 2.4.0

* New: Course navigation moves between both lessons and modules
* New: Page template for modules
* New: Filters for customizing quiz answer text and CSS class names
* New: Usage tracking
* Tweak: Remove Sensei Welcome screen
* Tweak: Remove theme check notice
* Fix: Tabbed navigation for `sensei_user_courses` shortcode
* Fix: Setting course start date for all students
* Fix: Only authorized users can view messages
* Fix: Only users with appropriate permissions can duplicate courses and lessons

* Fix: Fix JS bugs introduced by minification process
* Add: ESLint support

* Fix: Can't preview draft lessons in draft course
* Fix: Show Draft Lessons when Previewing course draft
* Fix: Issue with lesson excerpts
* Fix: Incorrect heading structure, Use h1s for headings on Module, Course and Lesson Order
- Add: sensei_learner_admin_get_row_data Filter. Managing table columns on Managing learners
* Fix: Learner Profiles: display correct url pattern when wp in custom folder. Learner Profiles Settings showing wrong learner URL Pattern when WP installation in custom location
* Fix: Ordering courses using "menu_order" and Courses > Order Courses doesn't work. WC: Don't construct WC_Orders
* Fix: Replace 'new WC_Order' with wc_get_order() function.
* Fix: Course not showing in My Courses if order is manually Completed
* Fix: Simplify CSS for displaying answer feedback
- Change purchase button text when a course is free. Change "purchase this course" for free products. Change "purchase this course" for free products
* Fix: Link course to a single variation of a variable WooCommerce product.
* Fix: Removed learner from Course comeback if see course single page
* Fix: Scheduled lessons not added to course page. Scheduled lessons should be added to course page
* Fix: Always show answers filter doesn't work for zero grade questions
* Fix: Single quotes in video embed HTML breaks on save
* Fix: WP_Query not getting reset on My Courses page. Reset postdata after resetting $wp_query
* Fix: Messaging issue on preview lessons. Correct the phrasing for lesson previews on Purchasable courses.
- Add: Learner Bulk Actions: Make Learner search more flexible.
- Add: filter sensei_send_message_link
* Fix: Learner Profiles can handle email-like usernames.
* Fix: Lesson: Allow Completing if Quiz has no questions
* Fix: "Complete Lesson" button missing
* Fix: Videos visible when prerequisites have not been completed
* Fix: Modification to users displayed in Analysis?
* Fix: some of the columns to be sortable for Learners in Analysis overview
* Fix: Weird html in shortcodes. Fixes excerpts in template to properly nest within paragraphs.
* Fix: New lesson: cannot assign to a module unless a draft is saved first. Lesson Admin: Populate modules on course change
* Fix: Pagination not working on course archive front page
* Fix: Featured course filter gives 404 on home page
* Fix: Multi Line Quiz responses displayed as HTML if saved and resumed
* Fix: Can't delete answer feedback
* Fix: Courses page sorting dropdown problems
* Fix: Autocomplete processing virtual orders not working
* Fix: "Free" Course filter displays courses linked to product variations
* Fix: Menu should not collapse when navigated to Messages
* Fix: Quiz Multiline as HTML is saved for teacher as plaintext-
* Fix: Sensei/WC Variable product: Start courses only when their variation is purchased
* Fix: issue preventing course author from syncing with lesson author
* Fix: Update name of WooThemes Updater plugin in notices
* Fix: Course Admin: Show the add lesson link even when the course has lessons
* Fix: Unpublished products should never be purchasable1
* Fix: issue with slashes in gap fill question answers
* Fix: Lock down wp-admin access when editing post_type quiz.
- Add: My Courses: Convert Tabs to filters
* Fix: My Courses Pagination broken
* Fix: Remove "All" filtering from settings
* Fix: Preserve lesson order w/ modules when changing course author
* And many more fixes and improvements