Method: Build Course Steps HTML.
@package: LearnDash / Builder
Source Files: includes/admin/classes-builders/class-learndash-admin-course-builder-metabox.php
Filter Hook: Filters whether to include orphaned steps or not. Orphaned steps are the steps that are not attached to a course.
Filter Hook: Filters course builder query arguments.
Method: Common function to show Selector pager buttons.
Class: Class LearnDash Course Builder Metabox.