webadmin: add plugged and link state columns to template->nics sub tab

Link state and plug state should be displayed for Templates on Network
Interfaces sub tab.

Added 3 columns-
- Combined (plugged + linked) status icon.
- Plugged.
- Link State.

Change-Id: Ib9ed230dd4baff141574e6cb585c413b5c2e575c
Bug-Url: https://bugzilla.redhat.com/907384
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>