[bug] binmat stacks display oldest card instead of newest
in the binmat gui, a stack is represented by its top card. this is fine (aside from not knowing how many cards are in a stack). however, binmat appears to be displaying the oldest ("bottom") card rather than the newest ("top") card.
in example, lane 2 discard's top card is a `N4%`u. combat happens in lane 2, so an `l8&` is also discarded. you would expect it to then display as `l8&`u, but it continues to display as `N4%`u.
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