Merge json files

Registered by DarkRedman

In the bookmarks manager, it would be more useful to add an option to allow the user to merge a json file or many json files into the bookmarks instead of to replace it.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
None
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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