LearnDash LMS 4.18.1

* Fix - Deprecation notice on the course page in PHP 8.1.
* Fix - Support a custom label in the latest transactions course widget.
* Fix - Can’t re-arrange/drag and drop Answers in Quiz Builder.
* Fix - Quizzes inside topic can't be re-ordered.
* Fix - Can’t correctly remove answers via Quiz Builder.
* Tweak - Format a discount properly in the purchase invoice PDF.
* Tweak - Improve a button label and a warning message on the quiz statistics page.
* Tweak - Use WP defined date/time format in course dashboard widgets.

* Fix - Parameters compatibility for the get_edit_post_link filter.

* Feature - Add new course dashboard with course performance metrics and data.
* Fix - Course 'Mark Complete' button validations.
* Fix - Sidebar hiding does not work in tabs.
* Tweak - Added Course-Presell support for the Student and Visitor shortcodes.
* Tweak - Set default course access mode to Free.
* Tweak - Support non /wp-admin URLs in the course video playlist.
* Tweak - Added actions: `learndash_dashboard_widget_before_loading`, `learndash_dashboard_widget_after_loading`, `learndash_template_before_include`, `learndash_template_before_include:{template_name}`, `learndash_template_after_include`, `learndash_template_after_include:{template_name}`, `learndash_template_entry_point:{template_name}`, `learndash_template_entry_point:{template_name}:{entry_point_name}`.
* Tweak - Added filters: `learndash_template_after_include_html:{$template_name}`, `learndash_template_after_include_html`, `learndash_template_args:{$template_name}`, `learndash_template_args`, `learndash_template_filepath`, `learndash_template_before_include_html:{$template_name}`, `learndash_template_before_include_html`, `learndash_template_entry_point_html:{template_name}:{entry_point_name}`, `learndash_template_entry_point_html:{template_name}`, `learndash_template_entry_point_is_enabled`, `learndash_template_html:{template_name}`, `learndash_template_html`, `learndash_template_include_html:{template_name}`, `learndash_template_include_html`, `learndash_template_pre_html:{$template_name}`, `learndash_template_pre_html`, `learndash_template_skip_rendering`, `learndash_template_admin_template_paths`, `learndash_dashboard_tab_is_default`, `learndash_dashboard_widget_course_lifetime_sales_transactions_chunk_size`, `learndash_dashboard_widget_course_latest_enrollees_users_limit`, `learndash_dashboard_widget_course_latest_transactions_limit`, `learndash_dashboard_is_enabled`, `learndash_dashboard_post_is_enabled`, `learndash_dashboard_section_hint_supported_html_tags`, `learndash_dashboard_sections`, `learndash_dashboard_sections_course`, `learndash_dashboard_widget_view_path`.
* Tweak - Updated constants: LEARNDASH_DEFAULT_COURSE_PRICE_TYPE.
* Tweak - Updated filters: `learndash_template_filename`.
* Tweak - Updated functions: `learndash_mark_complete_process`.