Serialiser_Engine: Deserialisation of nested lists

[FraserGreenroyd]

Fixes #2674

Test Files

Available here. The JSON used has come from @tg359 on the linked issue which this PR aims to resolve.

On alpha:

On this PR:

If testing using the provided test script please make sure you redrag the output of FromJson into the Explode component to get it to update. Alternatively, drop a new Explode component on the canvas and compare the cached one with the one from this PR.

E.G:

[adecler]

Overall, this makes sense.
I would have loved to be able to extract the type of object that are inside the list but this is is a bit trickier when dealing with json so happy with the current solution for now.

Just a minor tweak inside the DeserialiseNestedList method and then I think we are good to go.

[adecler]

I am happy with the corrections following comments.
All works well now and code makes sense,

[FraserGreenroyd]

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[FraserGreenroyd]

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[FraserGreenroyd]

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