lp1840287 Edit Floating Group Members

lp1840287 Edit Floating Group Members

Add functionality so that when editing floating group members, one
is taken to a page where one can edit a given floating group as
well as all its linked members.

Signed-off-by: Mike Risher <mrisher@catalyte.io>
 Changes to be committed:
	modified:   Open-ILS/src/eg2/src/app/staff/admin/server/admin-server.module.ts
	new file:   Open-ILS/src/eg2/src/app/staff/admin/server/edit-floating-group.component.html
	new file:   Open-ILS/src/eg2/src/app/staff/admin/server/edit-floating-group.component.ts
	new file:   Open-ILS/src/eg2/src/app/staff/admin/server/floating-group.component.html
	new file:   Open-ILS/src/eg2/src/app/staff/admin/server/floating-group.component.ts
	modified:   Open-ILS/src/eg2/src/app/staff/admin/server/routing.module.ts