HPCC-10185 Graph numeric properties sort as strings

Fixes HPCC-10185

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #4963 from GordonSmith/HPCC-10185

HPCC-10185 Graph numeric properties sort as strings

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>