webadmin: 'No No Alerts' shown in 0 alerts + cleanup

AlertListModel updates wrongfully its title.

did a little bit of clean-up,
since the fix there is no longer need for some of the items, and
the rest items are very old.

Change-Id: I0b4b4502e949343c10ae3cc3abef337b4c8378df
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>