More options for displays#351

It does not make sense to spin for most treasures, I hope there are more options to them.

And I don’t like the gemstone displays,

• the small one and the big one is too different,
• the small one does not look like a display for museum,
• and the big one have them all tilted in different directions making them look very messy,
  I would prefer an actually big display which take up two square and let the individual display stands for each gemstone be more apart