Boss for LearnDash 1.0.5

* Fix – show forum link if forum attached
* Fix – LearnDash navigation
* Fix – Quiz navigation
* Fix – Boss/Boxed layout integrations
* Fix – Make courses tab point to Group > Experiences URL
* Fix – List add-on support
* Fix – show course price in grid view
* Fix – Remove ‘course’ navigation if already on single course page
* Fix – Show manage navigation only if user is group admin
* Fix – Removed restrictions on display of ‘Course Discussion’ button in course teacher widget
* Fix – ‘Free’ price translation string
* Various CSS/JS fixes