feature requests: readonly and collapsed

[willie68]

Hi,

i'm using this in a open source IoT project as a part of the admin interface.
i would like to see a readonly flag (or disabled or something like that), which can be evaluated via vue conditionls. Delete, Add and the drag/drop should than be disabled or better, unvisible.

And i like to have another property, collapsed (or expanded), which will show the json collapsed (or expanded) on show.

And i like the #20 to be resolved, too.

Thanks for your effort...