Show asset graph in asset collection view

[LefterisJP]

Problem Definition

Normally in the asset view we show the asset graph. But if the asset is part of a multi-chain (or other) collection the asset view shows the breakdown nicely, but does not show the graph

We should definitely show a graph there too. The reason we currently don't is that it's not possible to ask for the graph of an asset collection from the backend. So this is a frontend and backend problem.

But it's solvable and we should have it implemented.

Task

• Backend: The asset graph data endpoint should accept an asset collection. If a collection is given then the asset data of collection members should be summed up for the timestamps where multiple assets of the collection have snapshot value and returned.
• Frontend: If the asset view is of a collection, adjust the code accordingly to make it work after the backend work.