Clone / duplicate context action

[joepio]

Being able to quickly make a copy of some resource from the context menu would be really useful.

Ideally, we can optionally set a target (which defaults to the current resource parent).

However, this poses a question: how do we deal with children?

• Keep track of a Map that maps old subjects to new sones.
• Keep track of all resources
• Store the subject to the map together with a newly created subject.
• Get all the children, iterate over the children, add these to the map. Recursive.
• Iterate over all the resources, save

Browser or server

• On the server is faster
• Requires a new endpoint
• Server will be signing the commits, not the user