Apparently, this is not possible. What appears in this Undo History seems to be the blurb name, which is a name used to register the plug-in to the GIMP API. This name is set at the very beginning (so even before the user choose a filter).
Deprecated. This option was mainly useful to copy/paste the G’MIC command line from the layer name, but a new button has been added specifically for that purpose, which is more practical to use.
And having a different behavior in the way the plug-in names an output layer, depending on an plug-in option, was not a good idea anyway.
Having an optional “label” option would be an interesting idea? Like gimp_image_undo_group_end (image, label)? Then the undo title would be “blurb: label”, for instance: “G’MIC-Qt: Drop Water” (or whatever the plug-in dev find a good label to describe what the plug-in did)?
I don’t understand which feature you are talking about here, but from the next message from @David_Tschumperle, I understand the feature to be removed was a good thing and it has been advantageously replaced by something better… (right?)
Just a note: sorry for plug-in devs, I am breaking quite a bit the unstable API these days, but I figure it’s better to do it now than be stuck for limited feature for the next 10 or 20 years.
@David_Tschumperle refers to the option of copying command from the gui filter. As a Krita user, it is great to have that. I can finally do the verbosity to layer, but by hand. There is still the need to create new layer on gmic in Krita.