Spider was only updating the new bounding box area after drawing cards
from the deck - leaving behind a sliver of the old deck.
This was a regression, as the game previously used the old bounding
box, introduced by GH-11153.
This matches basically all other Spider implementations I've played,
and makes playing much easier :)
I have left click-to-reveal in place, but mostly incase there is a
condition I've forgotten about.
Scoring is designed to mimic Microsoft's implementation - starting at
500, decreasing by 1 every move, and increasing by 100 for every full
stack.
Fixes GH-5319.
