ASCS-139 Add id to date input div to fix missing link from error alert

[jamiecarterHO]

What

Relating to ASCS-139 Adding an id of {{key}} to the container div for the date element.

Why

ASCS-139 reports an issue with samepage links from individual error messages in the 'There's a problem' error alert box to the element that errored when that error is on an incorrectly filled date component.

In hof v20.0.1 the components/date/templates/date.html had the following line removed: <input type="hidden" name="{{key}}" /> Without it there is no id or name with {{key}} in the date component template for the error link to move to.

Testing

Issue found on ASC running hof@20.2.13 and issue fixed with this update made locally. This issue is not found on UAT environments of forms running hof < 20.0.1 e.g. UKVI

[jamiecarterHO]

The original element linked to by errors with the {{key}} element was removed in this commit

[SarahJaneLuff]

lgtm