* Added hook to filter course grid html output
* Added docblock for html output filter
* Added class container class names and its filter hook
* Updated ribbon text escaping to wp_kses_post instead of esc_attr
* Updated load grid resources on LD courses archive page
* Updated plugin name and description
* Updated LD get course price helper function to allow users filter the values
* Updated to remove #ld_course_list wrapper on course grid shortcode to prevent conflicts with page builder plugins
* Fixed thumbnail course URL redirects to bare URL instead of nested URL
* Fixed short description unable to be set to empty because legacy value is not saved when saving new value
* Fixed undefined index error
