Add duplicate label creation

[bergsm]

Feature idea.

Currently when creating a new label, the only available option is to create a new label from scratch. In my experience, many labels I have created were very similar, with only slight differences to the JSON path between them. It would be nice to be able to clone or duplicate an existing label for these situations.

Describe the solution you'd like

The ability to duplicate an existing label when adding a label. Either as a separate button in addition to "Add label" or another method.

Additional information

If this is already existing functionality let me know! :)

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