Added dialog to confirm the user wants to unassign all instructors for a course offering when the user clicks the "Unassign All" button.  It the user does not wish to see confirmation dialogs this dialog is not displayed.  -- Changes provided by Dagmar Murray.
Added dialog to confirm the user wants to unassign all instructors for a course offering when the user clicks the "Unassign All" button.  It the user does not wish to see confirmation dialogs this dialog is not displayed.  -- Changes provided by Dagmar Murray.

nikeshmhr/unitime,nikeshmhr/unitime,zuzanamullerova/unitime,maciej-zygmunt/unitime,nikeshmhr/unitime,sktoo/timetabling-system-,sktoo/timetabling-system-,maciej-zygmunt/unitime,UniTime/unitime,rafati/unitime,sktoo/timetabling-system-,UniTime/unitime,zuzanamullerova/unitime,maciej-zygmunt/unitime,zuzanamullerova/unitime,rafati/unitime,UniTime/unitime,rafati/unitime