Adjust blueprint data when selecting new entities for existing blueprint

[SilentStorm]

When using the "Select new entities" button for an existing blueprint, mods do not appear to have a chance to adjust the blueprint data on save.

in on_player_setup_blueprint the blueprint is not setup, nor valid for read. However the same is true for on_player_configured_blueprint and the player does not have the blueprint in the hand as is the case when originally setting up a blueprint.

Because of this it appears to be impossible to store additional data required for custom entities.

[Rseding91]

This is fixed in 2.0