Allow deleting Crate names by inserting an empty string

[MalkContent]

Explain your idea

Currently the names of crates can not be removed via the same text field in their inventory menu that can be used to name them.
The names can be removed via regular anvil naming, by inserting an empty string as a name there.
I figured, why not copy that behavior :)

[MalkContent]

This issue is already mentioned as part of #6394
But I forgot about it.. I figured it doesn't hurt that this feature has its own issue.