The onclick event is subscribed and triggers a full component re-render even when the OnClick parameter isn't set and nothing handles it.

Reproducible in GoranG3: in EmployeeAdditionalInformationEdit, clicking on HxInputDate doesn't open the calendar dropdown but instead resets the model and re-renders the form.

(There's likely another bug in HxInputDate, where it doesn't stop the click event from propagating to the input!)