HPCC-11456 Word Cloud Build Error

Specify d3 entry point for third party sources.
Mark word cloud sources as "Copy Only".
Remove trailing "," in QuerySetSuperFilesWidget.js

Fixes HPCC-11456

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5898 from GordonSmith/HPCC-11456

HPCC-11456 Word Cloud Build Error

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>