[Feature Request] Customizable card maximum height

As the screenshot shows, I can only see 2 cards (`Card 5` and `Card 6`) in one page inside the stack if they reach the maximum height. So I hope the maximum height to be customizable, in which case I'll be able to see more of cards even if they contain many contents.

Similarly I also think it will be convenient to have "Show card body" toggleable in kanban view, not in YesYouKan plugin settings.

P.S. Thanks for this useful plugin. I like it very much.

The issue does not name files or tests. Start by locating the kanban card rendering and the YesYouKan plugin settings for maximum height and card-body visibility; done means both options can be controlled for kanban cards and the resulting layout matches the requested behavior.

Written by the indexing model from the issue text.