Suggestion - Allow mirroring same-league items from the Diplay Case mtx.

I'll keep this short and sweet.
As you can infer from the title, the idea would be to allow people to mirror items that are being displayed in a Display Case - obviously, as long as the item in question belongs to the same league it's being mirrored in.

Imho, this would help community mirroring projects, where eventually the main bottleneck becomes the time needed to mirror the item.

(It would also help combat the highly speculative and monopolistic practices we know of.)