Unable to localise fields using "Collection" as the form model #121
Description
When using a Collection backed model that is passed into form_with it clears out the param_key. The param key is used internally by form_with to assign the object_name field.
GOVUK uses the object_name to handle localisation of field params such as label, hint, description etc.
As we clear out the param key OOTB, GOVUK is unable to perform any localisation for forms that are assigned a Collection.
Is it possible to not clear the param_key? This looks like it would be a breaking change and a bit of work to roll this out but i think it's important enough to push for it.