show dictionary preview instead of counting children

[alikazemkhanloo]

Hi,
While editing plist files for OpenCore, I kinda needed a better preview for all items in a dictionary. Originally I thought of using table for editing arrays of dictionaries. but for simplicity I thought maybe we can add a preview to dictionaries, so instead of counting children, it can show more data about its content.

It seems a little ugly, though. I wanted to know other's opinions to see if we can have a better tool.
Maybe we can only show the content of the "Comment", But that will be so specific to OpenCore. Or Maybe adding opacity will help to have cleaner view.

Todo (if it is acceptable):

• update while the dictionary content gets updated