HPCC-11130 Filter clear button usage is non intuitive

Clear should just clear the form and apply should apply either a filter or no
filter.

Fixes HPCC-11130

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5649 from GordonSmith/HPCC-11130

HPCC-11130 Filter clear button usage is non intuitive

Reviewed-By: Kevin Wang <kevin.wang@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>