Display json returned by GNMI subscription and xml returned by Netconf in rich format

[jc-rode]

The json returned by the GNMI subscription is displayed in text format and that's very hard for a human brain to understand the structure...

Any chance it could be displayed in a rich format so that we could minimize/expand subtrees ? A bit like the yang models displayed on the right side ("search models").

Same for the xml returned by netconf in Netconf console... I can submit a separate issue if required.

Thanks !