Clone checklist when issue is cloned

Cloning checklist for cloned issues works out of the box. Statuses of cloned checklist items are set to unchecked/open.

Please note that cloned checklist takes precedence over default checklist and Checklist Text field content. It means that for issues cloned with a non-empty checklist, the default template is not applied and the checklist from the Checklist Text custom field is not applied.