Removed Downloader class
Removed import for Downloader class
Removed import for Downloader class
Removed the creation of the default assignment
Fixed issue with a course not having any assignments causing the assignment editor to not function. Fixed issue where clicking the assignment list would throw a NPE if the value clicked on was blank.
Fixed issue with assignment not being removed when removeAssignment method is called
Fixed issue with panel throwing NPEs when opening window for a course with no assignments