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>

Fix failing test.

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

Fix drag icon in Firefox.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Merge pull request #1286 from ashutoshdhundhara/rfe_908

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