Associate script inventories with a player

[raiguard]

I would like to be able to associate a script inventory with a player, to gain access to the hand and quickbar blueprint links. I have two usecases:

1. I am experimenting with a blueprint-library-as-a-hidden-blueprint-book mod, and while it works fine in the character's inventory, if I use a script inventory to hold it instead, you can't put links to its blueprints on the quickbar.

2. I wish to be able to set the hand location into a single-slot "void" inventory so that if the player clears the cursor, it will be dropped there, but if they put it anywhere else, it will remain. This is to emulate the vanilla behavior when getting a blueprint from the shortcut bar.