ui: Enhance to multi line list box for discovered hosts info

Adding host group, discovered host and compute resource informations to
multi line list box using ListModelTypeAheadListBoxEditor.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1109543
Change-Id: I3013e6c27f214c92acd50f1867ae84e2e25fcf75
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>