A couple of Steam Deck touch fixes.

Fixed

• Fixed a bug on Steam Deck (touch input) where tapping Undo could trigger a second, unintended undo, and where tapping the stock could sometimes flip the waste card and immediately flip it back.
• Fixed (touch input) dragging and tapping being slightly offset near the screen edges when the Fisheye effect is on, cards should now sit exactly under your finger everywhere on the board.