Solitaire: Bump stacked cards down to reveal suit

Stacks of cards currently cover the suit completely and players must
click-and-drag cards out of the way to see the suit beneath other cards.
This bumps the stacks down a bit to let players peek the suit without
having to take any action.

Userland/Games/Solitaire/CardStack.h

@@ -57,7 +57,7 @@ private:
         case Foundation:
             return { 2, 1, 4, 1 };
         case Normal:
-            return { 0, 15, 1, 3 };
+            return { 0, 20, 1, 3 };
         case Stock:
         case Waste:
             return { 2, 1, 8, 1 };