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.
Class: Class to create the settings page.
Method: Public constructor for class
Method: Override the settings form as we are not really handling settings to be sent through options.php
Method: Action hook when settings screen is being shown.
Method: Called when metabox is being saved.
Method: Function to show admin notices on settings page.