HPCC-11975 Restrict height of confirmation dialog

Clip visible list to a sensible amount (10) and display "...N more..."

Fixes HPCC-11975

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #6335 from GordonSmith/HPCC-11975

HPCC-11975 Restrict height of confirmation dialog

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>