HPCC-9046 Browse ECLWorkunits: sorting should be case-insensitive

When sorting by the owners, it appears that capitalized usernames
appears before lowercase usernames. This fix changes the sorting
from case-sensitive to case-insensitive.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>
Merge pull request #4272 from wangkx/h9046

HPCC-9046 Browse ECLWorkunits: sorting should be case-insensitive

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>