Major Description
Form has a #wantSubmitOnNestedFormSubmit() method (default to false), which allows to submit a parent form when the nested form is submitted.
The idea behind this issue is to have a #wantSubmitOnParentFormSubmit() (default to true) which will allow to do the opposite: preventing a nested form from being submitted when its parent is submitted.
dev@ discussion:
http://apache-wicket.1842946.n4.nabble.com/discuss-Ability-to-not-submitting-a-nested-form-td4670411.html