HPCC-11124 Unable to reopen closed WU Tab

Fixes HPCC-11124

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5629 from GordonSmith/HPCC-11124

HPCC-11124 Unable to reopen closed WU Tab

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>