RFE#908: Improvements for the table editor (index creation).

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>

Fix coding styles.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>

Make index columns sortable.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>