webadmin: add feedback image to webadmin

Signed-off-by: Einav Cohen <ecohen@redhat.com>
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>
Change-Id: Ic804e1ec2a7365898db7013a09639a2096a76184