CA-257927: If the list of items to be removed contains only 1 item, keep firing the CollectionChangedEvent for a single item.
CA-257927: If the list of items to be removed contains only 1 item, keep
firing the CollectionChangedEvent for a single item.

Signed-off-by: Konstantina Chremmou <a7d1f757a659045fb6db8c1e3849a1c8ad00b97a@citrix.com>

kc284/xenadmin,MihaelaStoica/xenadmin,kc284/xenadmin,kc284/xenadmin,minli1/xenadmin,jijiang/xenadmin,jijiang/xenadmin,minli1/xenadmin,stephen-turner/xenadmin,minli1/xenadmin,stephen-turner/xenadmin,stephen-turner/xenadmin,stephen-turner/xenadmin,MihaelaStoica/xenadmin,minli1/xenadmin,minli1/xenadmin,xenserver/xenadmin,MihaelaStoica/xenadmin,jijiang/xenadmin,kc284/xenadmin,xenserver/xenadmin,minli1/xenadmin,MihaelaStoica/xenadmin,xenserver/xenadmin,stephen-turner/xenadmin,MihaelaStoica/xenadmin,jijiang/xenadmin,MihaelaStoica/xenadmin,jijiang/xenadmin,kc284/xenadmin,jijiang/xenadmin,stephen-turner/xenadmin