Show warning screen before loading a world with unloaded objects #13
Description
Is your feature request related to a problem? Please describe.
Currently, it doesn't show a warning screen before loading the world with unloaded objects, so Minecraft will remove the blocks/items/entities/... without any warning before that happens.
Describe the solution you'd like
In the client, Blueberry should show the warning screen before loading those worlds.
In the server, Blueberry should interrupt the loading of the world/chunk and allow the loading of the world with a special flag.