lp1840287 Edit Floating Group Members

lp1840287 Edit Floating Group Members
Add functionality so that when editing a floating group, one
is taken to a page where one can edit a given floating group as
well as all its linked members. New functionality:
- eg-admin-page can hide fields
- fm-editor can create a record with fields defaulting to values

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