Show Castling Rights in Puzzles

I think it would be useful to show if castling is still possible in the puzzle positions. This might be relevant for the solution. Because the previous moves played in the game are not shown, it's not possible to determine if the kings or rooks have moved if they happen to be on their original squares.

but previous moves are shown...

Ah, you are right. In normal mode they are shown. I was using the Zen-mode. Perhaps, this could be something for the Zen-mode only then.