webadmin: change search to be case-insensitive

This patch adds a case sensitive flag in the search bar, passing it over
to the engine (this functionality is already supported in the engine)

Change-Id: Ia2c5f48cf565533c330c80a02ee24596ee039e2d
Bug-Url: https://bugzilla.redhat.com/828080
Signed-off-by: Oved Ourfali <oourfali@redhat.com>