HPCC-12077 Grid Hyperlink clicks do not get de-registered correctly

This causes the hyperlink event to fire more than once on subsequent visits,
which invariably will corrupt the embedded HTML.

Fixes HPCC-12077

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #6338 from GordonSmith/HPCC-12077

HPCC-12077 Grid Hyperlink clicks do not get de-registered correctly

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>