Please see SpiffUI - Inventory v7 -- Release Notes

New! Added function to transfer keys to a key chain if applicable
Updated to use new "SpiffUI.Bag" item for item container definition.
Fixed calculating capacity for inventories

HUGE update!
Please check: https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/2799848602/3722820118825577211/
Bugs fixed:
Fixed the Double-Click action for all added containers.
Fixed proper detection for added containers for transfer actions. Should stop items from disappearing.
Fixed Inventory Window appearing when using the keyboard to aim, or when "Toggle Aim" is enabled. (Thanks @Lomion)
Fixed error that would occur on respawn after death.
Fixed gathering of inventories for containers
(Hopefully)Fixed compatibility with "Even Worse Looting"

Fixed the Transfer actions missing from vanilla containers

Updated SpiffUI Base to bring it inline with SpiffUI-Radials (no user-noticeable changes)

Added Russian, Spanish, and Thai translation.
Thank you fourteensix, ElDoktor, and radiusgreenhill!

Added option to Autohide only on mouse click