Add standard field value when the information is not specified on the packaging

[stephanegigandet]

From aleene:

it would be nice to know whether product information is lacking or does not exist on the packaging. Thus a controller would know if there is still work to do. A standard value such as "na" could indicate that the information is "not available" on the packaging.

[stephanegigandet]

We could look at some examples to see if we should differentiate "Not specified" and "Not applicable".

To facilitate data entry, maybe a clickable button to automatically add "Not specified" in the tag list.

[VaiTon]

In my opinion the 'n/a' with a button would be a simpler choice for most users