immersive-mouse IMMERSIVE MOUSE MODE: Disable shift-clicking into containers which aren't in FOV

[Byrnorthil]

I've been using immersive mouse mode for most of my playthrough as I find it very nice not to have my controls locked up while I'm in inventories. However, sometimes I will open a chest, turn around to grab items from another chest, forget to close that chest, then shift-click only to have the items go right back where they started. While this is definitely a skill issue, I still think it would be a great idea to prevent shift-clicking from putting items into a chest you can't currently see, as I struggle to think of a situation where you'd want to do that.

[Diff]

Don't have much time at the immediate moment, but I was poking around and found these. Looks like a decent tree to bark up for starters.

https://apidocs.vintagestory.at/api/Vintagestory.API.Common.IInventory.html?q=GetBestSuitedSlot#Vintagestory_API_Common_IInventory_GetBestSuitedSlot_Vintagestory_API_Common_ItemSlot_System_Collections_Generic_List_Vintagestory_API_Common_ItemSlot__

https://apidocs.vintagestory.at/api/Vintagestory.API.Common.IPlayerInventoryManager.html?q=TryTransferAway#Vintagestory_API_Common_IPlayerInventoryManager_TryTransferAway_Vintagestory_API_Common_ItemSlot_Vintagestory_API_Common_ItemStackMoveOperation__System_Boolean_System_Boolean_