Dataflow Export to JSON should include linked tables

[pascal_belleros]

When exporting a dataflow to JSON file, it should include the queries that are pointing to linked dataflow tables.

I have spent so many hours searching for specific changes in the tables only to discover that the table was a linked table and was not available in the JSON file.

I really don't understand why it shouldn't be there. Otherwise, we don't really have a mean to trace data all the way back to the linked table.