So, I honestly thought this was a functionality already, or that it was in the past, but it's pretty self-explanatory;
When a player picks up, say a bowl, or a pickaxe, via the RightClickPickup behavior, it should prioritize the currently selected active slot, and if it's empty, allow the item to go into there. Currently, say I have slot 8 (empty) selected on my hotbar, and pick up a bowl, it'll go into slot 2, or whatever is the first available, but I think it would be much nicer (as a QoL toggle, or setting), to go to my active slot, allowing me to eat straight away, or use said tool without having to now scroll to it.
This would also allow me to set my hotbar upon picking up the items, instead of having to re-arrange them later.
I had tried looking into modding this behavior, and found it fell under the vssurvivalmod/BlockBehavior/BehaviorRightClickPickup.cs @ OnBlockInteractStart(), but was unable to append this functionality onto an already existing item. This is more likely due to my inexperience when it comes to modding this game.