Add persistent chest storage to player hut

[zorfmorf]

Not all storages are saved and persisted. Only the player inventory and the player chest. Other containers (such as from vendors) are recreated everytime they are opened.

In addition this means that we actually have to add a chest dialog to open the container in retrieve mode or the player inventory in store mode. Store mode needs a target as well.

[zorfmorf]

This also helps testing:

• Container retrieval mode
• Container storage mode

[zorfmorf]

Eyyyyy. Works.