[Rest] Charts have always a label

[mueller-ma]

The rest api always returns a label for charts. If I don't set a label explicitly, the rest api will return the item name (that is displayed in the chart) as label.
IMO this behavior is bad, since software using that api cannot distinguish between "human readable label" and "automatic generated label". In latter case, the client doesn't want to display the label at all or replace it with Chart.

[J-N-K]

Is this still the case and if so, how can I reproduce it?

[lolodomo]

There was a field "source" added few months ago by PR #3804 It allows knowing the source of the label
I guess this is fine now and we can probably close this issue.
@mueller-ma :please confirm.

[mueller-ma]

I cannot reproduce this anymore. When the chart has no label and the item of the chart has no label, the api returns label="".