HPCC-10711 Add "thor usage" to new ECL Watch

Fixes HPCC-10711

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5618 from GordonSmith/HPCC-10711

HPCC-10711 Add "thor usage" to new ECL Watch

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>