Access rule editor: clearing 'accessed between' fields doesn't work

[ato]

If a rule has an accessed between date range filled in, after clearing the fields and pressing save the date is still in the rule.

Workaround:

curl http://localhost:8080/mycollection/access/rules/123 > rule.json
edit rule.json and change "accessed" to {}
curl -i --data @rule.json http://localhost:8080/mycollection/access/rules