webadmin : Volume main and sub tabs' columns sortable

This patch incorporates the sortable columns to the
volume main and sub tabs', "host" tab's "brick" sub tabs
columns.

Change-Id: I4795251fc2a73eb347f1e891d6c5f40ed8a67e47
Signed-off-by: Anmol Babu <anbabu@redhat.com>