Add card "found in sealed product" section.

[axxroytovu]

Now that MTGJson hosts a "source products" object, it would be great to have that displayed on the card page in some way.

E.g. from Archon of the Wild Rose:

"sourceProducts": {"foil": ["1ff62823-f41c-5334-af14-20c5cc28e84d", "86ab9007-922a-5f13-8ffa-aaa8b775c06c"], "nonfoil": ["1ff62823-f41c-5334-af14-20c5cc28e84d", "86ab9007-922a-5f13-8ffa-aaa8b775c06c"]}

[taw]

Yeah, I'd like to integrate the whole system someday and not just leave it like this, but I don't have time to do the development right now.

[taw]

I sort of have products now, so I could possibly progress this.