lp1895706 Unarchive Old Courses

lp1895706 Unarchive Old Courses

- Add option to unarchive old courses
- Remove non-public Course Users when unarchiving course

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>

 Changes to be committed:
	modified:   Open-ILS/src/eg2/src/app/staff/admin/local/course-reserves/course-list.component.html
	modified:   Open-ILS/src/eg2/src/app/staff/admin/local/course-reserves/course-list.component.ts
	modified:   Open-ILS/src/eg2/src/app/staff/admin/local/course-reserves/course-page.component.html
	modified:   Open-ILS/src/eg2/src/app/staff/admin/local/course-reserves/course-page.component.ts

Signed-off-by: Beth Willis <willis@noblenet.org>
Signed-off-by: Jane Sandberg <sandbergja@gmail.com>