* don't let explosions destroy sign entities
* destroy sign entities if sign node is exploded
* remove redundant destructor call
* make sure other things don't try to interact w/ the signs entity
* name will be "" for non-players or unknown players.
* remove default value from initial values
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Co-authored-by: Niklp <89982526+Niklp09@users.noreply.github.com>