Fix ajax rerendering of nxu:inputList tag

The tag nxu:inputList caches information that's not reset on ajax calls because this cache data is needed when adding or removing elements from the list in ajax.

=> this cache should be reset when model is updated to avoid keeping selected values when submitting the form in ajax.

Note that NXP-4716 offered ways to reset this cache explicitely.

See NXP-8067 for similar issue on chain select tag.