Method: Called when metabox is being saved.
Source Files: includes/settings/settings-pages/class-ld-settings-page-courses-builder-single.php
Method: Add Course Builder link to Courses row action array.
Method: Filter the LearnDash admin menu (tabs). We remove the ‘Course Builder’ tab until needed.
Method: Override the settings form as we are not really handling settings to be sent through options.php